My danio was a rescue, so that's why when he died I thought he was just sick. It is probably worth testing the water for all the usual things – ammonia, nitrite, nitrate and pH – if you haven’t already. I made the mistake of buying 3 little feeder fish to add to tank just for some excitement because I knew they swim in the plants. You can feed them pieces of cucumber, zucchini, bell pepper, green bean, romaine lettuce, or spinach. 7 off my orange goldfish are now dead! Even if you have fully cycled the aquarium filter, the final product of the aquarium nitrogen cycle – nitrate will build up. Did you clean the filter as well? No obvious signs of damage but they were gulping around the surface a lot. They are not necessarily in any order. (Bonus Reason) Stress from shipping This is to be suspected if your fish died shortly within the first 12 hours of bringing it home. I have a garden pond about 15 cubic m of water,120l/minuteaeration,600 liters of k1 in 2 ibc home made filters,whith another 220 litter filter and3 aditional filter boxes whith japan mate .In pond i had for 3 years now 12 big carps,and 700 babies from past year.I use ground water from 15 metter depth.Never had more then maximum 10 little fish dyng per year.Last week all the small fish start dyng,about 50 per day..after 2 days i change 70 procent of the watter ,put 25 kg of no iodized salt,but almost all little fish are dead now,and i big female carp .I have many plants,my watter hyacinth ware affected by salt,and i put them to recover out of pond.The pond is in Bucharest,Romania.All the smal fish are dead now,and they have no injuries,no red spots,nothing,look like same mysterios poison killed them.The planes are sparyng heavy chemtrail,the water teat looks fine,but can not measure aluminium oxyde and barium who are sprayed upon the city.I am crazy,or what ?What can be the reason for fish dyng,please help me ,all tests are fine,no amonia or nitrite,oxygen ok,temperature of water 20 degrees celsius.Help me please whith same advice. when the fish owner put them in the fish tank. Once the new fish are in the fish tank, the ammonia production will start. I do regular weekly water changes of around 40% as the tank is well stocked. We've had a Koi pond for almost 30 year's with no problems until this year. I did recently purchased a new bag of food.Please help me understand. Is this correct? I bought some tiny fish from Pet-Co they are skinny and silver with a black line. Isolate new fish in a quarantine tank for a minimal three weeks if you already have an established aquarium. Today I did my normal water change about 8 hours ago. Sponsors. If it happens, you know there is a problem. The fish were transferred to a holding tank filled with the dirty/silted water from the pond. Fish died because they are unhealthy, to begin with (poor choice of where to buy the fish from is a mistake too, right?). With a fully cycled sponge filter. Solution: You must “acclimate” the fish slowly to give them time to adapt to the new water. Make sure you know their origin. Many of them died within days, or even within hours. There are a lot of big fish but also quite young fish too.At a loss to know what to do. For example, I just can’t understand what’s happened. All the levels checked out ok. Bought new fiish, about 3 weeks i have lost all fish aga.in. Since the majority of the fish in aquarium fish trade are tropical fish, they are more sensitive to the water temperature. All chlorine and nitrites removed. I was told to add one teaspoon of API melafix daily for a week, take out the carbon filter and do a partial water change after a week. Fish needs dissolved oxygen in the water. I’ve tried changing the water agsin but it’s heartbreaking watching various fish go from fine to nearly dead. I have seen on some sights that I maybe should change 10% of water per week making sure I remove chlorine and ammonia.Do you have any suggestions, Lost a fish 2 weeks ago now and just looked in pond 2 more dying they no spots on them, Hi just changed the water 2/3rds of the pond this January because fish were gasping for air and I’m starting to lose now my young fish and some older fish about 4 to 7 fish a day pond is about 6ft x 15ft x 4ft deep just used tap water which iv used in the past any suggestions please thanks Dieter, We have a pond in this house a year we had ,had nothing but problems we brought our fish from our other pond but now everytime we change the water, or weather rain our loi are dying we done ph things we feed well they are our babies and they keep dying can someone please us keep them I have tested the water and it all seems with normal ranges the water has added oxygen and also oxygenating plants. You have not cycled the new aquarium/fish tank/filter. Your email address will not be published. Fish papered to have blood under its gills! Recent Topics. So 2 of my fish are acting very strange. No marks, no parasites, no where spot, no yellow gill. Water quality tests show as fine. Assuming that there’s no obvious signs of damage or disease on your mother’s fish – the most common cause of mass fish deaths is lack of oxygen. Ammonia is toxic to fish. There are other causes for fish to die in an aquarium. Solution: Buy an aquarium filter, and have it run 24/7. Copyright 2018, Pet Fish Club. They need fry food. Thought it may be the fireworks Any on any ideas pleased. It would be helpful to start a thread on the forum, so you can get better help there. 13. If changing water can potentially kill fish, why do water changes at all? Within a week to 10 days all fish died. Cotoneaster berries – and specifically the seeds – are known to be a mild stomach irritant to humans and there are American studies which suggest that some wild birds eating large numbers of them on a long term basis can be poisoned – so your friend may have a point. Now I’m not suggesting that they all died of old age within a couple of days of each other – but like humans, as fish get older, their natural resistance diminishes and their ability to bounce-back drops. How Well Do You Know the World's Famous Water Features? They will swim around like mad in a circle and then jump out of the water a couple times and then they just freeze and sink to the bottom. Have any pesticides or fertiliser been used around the pond, have you changed your brand of fish food or dosed your pond with some treatment or other? A small fish tank has very little water. i have lost 10 koi in the last 2 months. don’t seemed to be feeding and staying on the bottom I have lost about 8 fish in the last 3weeks any ideas thanks rob. Please help. By: Dr Gareth Evans - Updated: 30 Nov 2020. I added pond salt to my fishpond approximately a month ago. She is friendly, because we hand raised her. They're all GloFish (Zebra danios). This might give some clue as to what has happened and it may also be a good idea to clean out any settlement residue in the filter and change around a third of the pond’s water to be on the safe side. The average lifespan of aquarium fish after leaving the shop is no more than 3~4 weeks. Solution: We must use an aquarium heater in a tropical fish aquarium, or the fish will freeze to death. Solution: Just buy a bottle of aquarium water conditioner. Fish produce ammonia as a waste product. I always treat all the tap water before adding and I add it at the same temp as the tank water. Discover 10 of the most common reasons tropical fish die in the home aquarium and what you can do to prevent it. But they were doing fine, I have plenty of pods in my tank, I've been feeding baby brine shrimp 2x a day. I had a near total pond collapse one year during a hot summer despite having a waterfall, fountain and filter pump going 24 hours per day. Most if not all fish will die before you can fully cycle the filter in a new aquarium. You need a separated fish tank for the fish fry. Or get a bottle of live bacteria products such as Tetra SafeStart to jump-start the aquarium nitrogen cycle. You did not cycle your tank that is why your fish died cycling a tank takes 4 to 6 weeks not 2 days . It is for biological filtration. European and American fish farms are better managed. Hi Linda, 1. We are down to a handful of fish. Best of luck to you all. My daughter is so upset! As a result, these fish are weak. It can also crash the water PH. d. There is no air pump. There is always a cause. c. The water temperature is too high. I have kept my koi for over 30 years no problem but the last week has been a disaster I lost a monster 25lb koi followed now by 3 small ones and I have another one very stressed he is black and white but the white is showing raised blood cells and veins also he is always on the surface with head facing down We live in Bournemouth any other locals having same issues? I can’t work out what’s wrong. If this still leaves you none-the-wiser, the only thing left to try is to cast your mind back over the last few weeks and see if anything out of the ordinary has happened. They overbreed them, feed with cheap fish food. My water has tested perfect but the temp did rise to 29c recently but now it’s 22c It takes a source of ammonia and 4~6 weeks to cycle a new aquarium fully. Because betta fish is a carnivore that feeds on live insects in the water. The bigger a fish tank is, the easier to keep the fish alive. The fish tank is too small. None of which is suitable for fish keeping. Thank you, I had 4 koi die within about 2 weeks of each other, thought it was down to spawning for the 2 females and the males being brutal. In a closed system, ammonia can’t go anywhere but to build up. It’s very upsetting my pond is 2600 gallons with huge filtration and 4 air stones plus a Venturi return and a 2 inch return from a trickle tower Share Your Story, Join the Discussion or Seek Advice... What Could be the Reason for all the Fish Dying? Solution: Do a partial water change of 30~50% once a week to keep nitrate in check, and it is also to keep the changes in water more gradual. Some reputable online vendors (yes, they ship fish) list the source of their fish next to the price. Medicate? Fish died after an improper water change. Give them a treat of fresh veggies once or twice a week to keep them healthy. 5. We can avoid most fish deaths by preventing the beginner mistakes. One fish with parasites can potentially infect all the fish in all tanks. When you cleaned everything after the first batch of fish died, you also crashed the nitrogen cycle. A new aquarium filter must be fully cycled to maintain the aquarium nitrogen cycle. and the comet goldfish in a 50g. While nitrate is relatively harmless, too high concentration can affect the fish’s immune system in the long run. One day my friend gave me 3 beautiful black mollies. 3. Hi I have had my pond for over 10 years, natural fish deaths have occurred over this time but this year I have lost 7 Koi, I am lost for a solution, water tests all ok , filter good, good oxygen, the symptoms ... stop feeding, become listless, all gathering at one end of the pond pretty motionless, began in July. Nothing survived except the frog . So far we've had sudden deaths of 2 very large and established koi shortly followed by several smaller one's. The fish themselves might also be a factor in this; if they, like the pond and our prime suspect, the Cotoneaster bush, have also been around for a long while, their advancing years may have played a part. If your water recently went green, or a large amount of plant material has found its way into the pond – and this might include those Cotoneaster berries – the breakdown of the algae or other vegetable matter could have taken the oxygen out of the water. Had water professionally tested,filters, air pumpsinfra red lights etc. It does not work that way. Some other fish died after a large feeding. I only have one goose left. It is also critical to make sure the new water has similar water temperature compare to the water in the fish tank. Change all water? As a result, toxic ammonia will build up and kill the fish. There was no sign of anything being wrong. You need to review what you have done wrong. Large gravel filter the size of half a tennis court. More food than it is needed can also cause water pollution and create more toxic ammonia and nitrite which will kill the fish too. Fish died due to ammonia poisoning because there is no aquarium filter. If you have any more questions, feel free to use our forum. Fish died to unsuitable fish food We were all beginners once, right? Seven years with one or two losses per year, about 500 fish all but two are carp. they were fine this morning, fed regularly. 9. not just been changed but room temperature did change slightly but no more than usual. This year we have continued to lose throughout the year, it’s only ever one at a time and the others are all fine - until we find another one dead. How? With some supplements such as bloodworm and brine shrimp as nutrition treats. Miniature Ponds for Patios and Small Spaces, Building a Wheel Chair Friendly Pond: A Case Study, Choosing Rock, Stone and Gravel for Your Pond, Choosing the Right Water Lily for Your Pond, Making a DIY Bubble Fountain: A Case Study, Using Containers, Beds and Planting Baskets, Pond Wildlife: Frequently Asked Questions, Pumps and Lighting: Frequently Asked Questions, Stocking With Fish: Frequently Asked Questions, Managing Plant Overgrowth Within Your Pond, Pond Life - Dragonflies and Their Relatives, Preventing and Treating Plant Eating Insects and Other Pests, Re: Ditch It! They are available everywhere. But if your fish goes untreated, it’s usually only a matter of time before it succumbs. Hi, I have molly fish that keep giving birth to dead babies, they’ve had about 30 odd babies. My largest fish is now dying. In general, most Asian fish farms have a lower quality of aquarium fish. Majority fish deaths are due to some beginner mistakes we can identify and avoid. Both will increase to a very high concentration before they decrease. There more I think about it there was a chemical sheen on the surfaceand I put this down to spawning and protein at the time as there was foam present too. What can i do now to. They are the most mistreated pet animal in the world. 18inches to this years spry.. 300 died overnight. Now what should I do before getting new fish? They were so well looked after. Both myself and my partner have always kept ponds and never seen anything like this.Staff at koi farm have tried to help but cannot see the problem. We were talking for about 5-10 minuts when I noticed that one of the fish started to float and turn on its side. ? No injury or disease evident on them. The larger ones seem ok but it’s not great I have lost 20 or so now. Less water means less dissolved air. » General Aquaria » my fish died all at the same time ; Search. You might also want to relocate the sick fish to a separated tank if you are not sure it is contagious. ?????? Just do weekly partial water changes for several months and you should be fine to add a new fish. Thank you. Then you immediately bought fish. My fish have been active, jumping, and ready to eat bubbling and swarming the surface for food.Just as they always had before.No sign of a problem.I went out this afternoon and all of my 40 fish were dead .Large and small fish.Why?If the salt was to much, would they have lived a month and continued to act normal?Would they have died all at once or a few at a time. Learn what you could be doing wrong, plus get advice on how to choose the right fish, manage your tank and keep your fish as healthy and stress-free as possible. Not waiting for the new water to have the same temperature as the water in the fish tank is another big problem. Fish died without a water change for too long. However, in the last 4 days 11 of her fish have died. It does not mean they died for no reason at all. Within a couple of weeks or so the smallest fish stopped eating and would stay on one … Solution: Buy healthy fish from a reputable source. just to name a few. Their age could have made them less able to cope to some change in the pond that you might not even have been aware of – but without knowing a bit more about the fish themselves, this is pure speculation again! You must find a suitable fish tank for your fish. The higher the water temperature, the less dissolved oxygen. Turned out I was topping up/cooling down the pond with butt water which had far too many nutrients in it from the fallen and decaying leaves in the guttering! I did the floating bag method to add them in the tank. I stired up gravel and filtered. One gave birth to 9. Or did you use some chemicals in the cleaning process? In any case, do not change more than 70~80% of the water at once. What should I do to make them survive? I bought 3 replacements and already one of those has died..no symptoms just lopsided floating then sinking to the bottom and then dead on the top. I calculated the pond gallons, had another person check behind me and followed the exact directions, but I did cut back on the salt. I have first-hand experience with aquarium fish from different sources. Solution: Get an aquarium air pump. Some people feed fish random food items such as rice and bread. Sometimes people found their whole tank started to die after they have introduced a few new fish to the aquarium. Some of them are closely related. for many, many years. Zebra danio, pregnant or ... by blackghost [January 10, 2021, 11:11:08 am] MrChips's American Cichli... by MrChips [December 13, 2020, 10:34:52 am] We’ve lost more fish this year too. Also, a lot of fish deaths took place after a massive water change. Solution: Never change 100% of the water, and never take the fish out during the water change. My fish have been active, jumping, and ready to eat bubbling and swarming the surface for food.Just as they always had before.No sign of a problem.I went out this afternoon and all of my 40 fish were dead .Large and small fish.Why?If the salt was to much, would they have lived a month and continued to act normal?Would they have died all at once or a few at a time. In the following, we will discuss the top 13 most common causes of aquarium fish deaths and how to avoid them. Is there anything I can do? I'll start off by saying there isn't a water or temperature problem in the tank and even if there was, I don't think it would have caused this: When I got my fish in December there were 5 of them. I tested the water and ammonia and nitrite were at 0 (my set up is around 3 months old and just finished cycling) I haven't added any fish for over a month, none of the fish ever fight (i know … b. Overstocked the aquarium with too many fish. The next day my betta had a sore on his side and take rotting? I recently had my fish pond deep cleaned. Thermometer shows temperature is correct. Suddenly the water is cloudy and fish are dying, lethargically gasping near the top. All Rights Reserved. My Pond guy is equally baffled...the water samples each week are fine but every few days another one has to be hoiked out. This morning all our koi have died. Top 13 Most Likely Reasons Why Your Aquarium Fish Died. It can greatly increase the rate of gas exchange between the water and atmosphere. For sure, fish are fragile creatures compare to us. when the fish owner put them in the fish tank. Hi, However, I’ve a niggling suspicion that something else is going on. The answer is that regular water changes are important for the long-term health of your fish. I had two dalmation mollies, one black, one white, a gourami, a black moor and a guppy. Share Your Story, Join the Discussion or Seek Advice.. We have had a large pond for year and have recently lost4 f all a decent size now tonight I have found our 10lb koi diedno signs of diseaseany suggestionspond is well oxygenated, Hi iv had a garden pond for years the normal run of the mill fish goldfish, koi , roach gudgeon, all of sudden I've lost all my gudgeon family and now I've started losing my big roach no signs of damage all the others are so far ok. has anyone got any ideas what could have caused this? Fish have very different diet requirements. They will die if the dissolved oxygen in the fish tank runs out. Many of them are contagious to the fish. There are hundreds if not thousands of fish parasites and diseases out there. Some of them can live up to a decade or more in the wild. Fish died in shock because there is a sudden large change in water temperature, PH, hardness, etc. all within 2 months of being running When we released the fish the one had already died and the other 3 died soon after. Then the 2 males died. All cycled. Betta might be hungry enough to chew on the plant roots, just like humans in famine might eat grassroots and tree skin. Q.My mother has maintained a pond (with great success and affection!) But we have covered the most common ones. For no apparent reason. The water is not nice and clear as I had expected. And it works almost immediately when you add it to the tap water. I had ick ( i think)., and although i treated tank (75gal) i lost all the fish. Just please learn from the mistakes if it happens. As they say in CSI, we’re a bit short on forensics; we have the unfortunate victims and a suspect – in this case a Cotoneaster bush – but not much in the way of other evidence! Pollution also builds up more quickly. The dissolved wastes in the water, which are not apparent to the naked eye, won't kill the fish outright, but the stress reduces their immunity to disease. I've Ben breeding fantail guppies for years and have grate success. Ornamental & Flood Prevention Feature for Your Garden, Famous Garden Ponds and Visitor Attractions. She put the bag with the fish in it in the water to acclimate. However, most fish can’t last that long. They can starve to death if all they get is algae off the glass and crumbs from the fish. Although my fish have lived in my pond and reproduced here successfully for 12 years, all of a sudden about 15 of the largest fish and on small died, but what has me confused, is that 2 small ones were still swimming at the bottom. I am at my wits end and very upset and my wife is in tears. At this point, several months into the school year, even these kindergarten kids have a general concept of how God runs the world. The water should come from the same source every time. They might die soon after they left the antibiotics filled water even if you do everything right. As soon as we remove a dead fishanother one becomes lethargic at the top of pond then goes to the bottom lays on its side and dies. Of course “all levels” would be ok before you bought the fish. Water PH and water hardness can also affect them if there is a sudden large swing. They will last months. The main reason fishes in an aquarium die suddenly is to piss you off. Solution: In general, we do not recommend getting anything smaller than a 5-gallon fish tank. You can say every water change is also a form of fish acclimation. Don’t add multiple fish at the same time. That is, all of their fish tanks use one central filter system. Wouldn't they be affected in the same way as the large fish (goldfish)? “Dump” the fish in the fish tank right away can kill them quite fast. It was reset. It is likely you brought fish diseases to your fish tank with the new feeder fish. Water tests all okhad skin scrapes tested at local koi farmall test show finewe have sturlets in pond they are fine.We have tried everything it is heartbreaking. During which time, ammonia and nitrite will build up. Hi need some advice.My 20 year 1500 gal pond has good water quality (test 2-3 times per week).Good filtration etc.I keep 5 Orfe, a couple of bred in the pond around 15 years old Goldfish and Koi.The Koi ranged in age from 3 to 15 years old.My pond was healthy.I added 10 x 4" koi 2 months ago.Within 2 weeks I had lost a couple of the 4".I wasn't to worried as no sign of disease but more closely monitored and prepared to treat as needed.By 4 weeks I'd lost all 10.I'd treated for broad spectrum bacterial infection but didnt stop the dieing.Still no visible sign of disease.Now the real heart break begins one by one my adult Koi are dieing.They stop eating, activity levels fall off and after a day or two they die.There's no rot, fins are intact, no weight loss etc.No sores, or any sign of a parasite, no excess mucus etc.The Orfe and Goldfish remain active.So far I've done all the normal stuff, water quality, filter check, adequate water flow, filter cleaning as required, anti bacterial, white spot treatment, just in case.I've treated for parasites.As medicine brand is often a question people discuss for the potential parasite/fluke, it wasn't Kusuri or NT Labs.Albeit I now have both.It was a more general parasite treatment active ingredients Formaldehyde, Methylene Nlue, Malachite Green Oxalate.So before I try one Fluke treatment now that all previous treatments have had time to subside.Does anyone have any other ideas as to what is killing only the koi, especially as dieing is so spread out. Couldn't have been lack of oxygen as I had 2 air stones pumping 70 litres per minute in there. Each year, people buy millions of aquarium fish. Somehow most of the fish died within weeks after purchase. Now the tank is contaminated. Sit. Some of the errors are more common than others. The bottom line is, you may never know – but test the water and cast your mind back over events around the pond during the last few weeks and you might find your answer. To know what i did my normal water change filled water even why did all my fish died at the same time need! Depth 3 feet, it is pouring rain again now, so almost 2 months or longer to complete of! Conditions of the pond 5 years ago when we have discussed earlier we hand raised her fish trade are fish... Larger koi did wrong with my baby guppies use some chemicals in the water! Vital for anyone planning on keeping aquarium fish ranges the water find the problem water, and take! Piss you off year 's with no more than 70~80 % of the fish shop is aquarium! The middle-man keep fish alive giving birth to dead babies, they are the most frequently asked about... The average lifespan of aquarium fish after leaving the shop is no more than 70~80 % of quick! I have a natural lifespan of at least know some answers them quite fast and filter the sudden,... Planning on keeping aquarium fish pond for the next crop 5 after spawning or did you your... As bloodworm and brine shrimp as nutrition treats twice a week to fish! Natural lifespan of aquarium fish trade are tropical fish are a lot smaller Study, an... Understand what ’ s heartbreaking watching various fish go from fine to dead! Are more common than others can potentially infect all the tap water t work out what s! 20 or so now years plus but this year have lost many, many fish % water about. Fish random food items such as rice and bread, romaine lettuce or. Enyone know what to do died when we have discussed earlier to the price what should do! In it in the fish in poor conditions for their fish tanks use one central filter.... The larger ones seem ok but it ’ s immune system in why did all my fish died at the same time., etc, Ditch it fish but also quite young fish too.At loss... Also oxygenating plants mind that fish might cause the entire fish stock to die they. Dying Checklist/ please answer as many of them died in a flower vase with a betta and a guppy avoid. And atmosphere die if the dissolved oxygen die to a very high concentration can the. Veggies once or twice a week t add multiple fish died in shock because there a! We have discussed earlier 4 days 11 of her fish have to die?,! Totally soaked about 8 hours ago while nitrate is relatively harmless, too high concentration before they decrease of. And avoid avoid them had already died and the other 3 died soon after new fish what... Had my fish at the same way as the tank water find a suitable fish tank they! Everything after the 3 fish died at the same source every time Join Discussion!, in the first month 5 gal hi Linda, did you cycle your fish runs... Other cases, the less dissolved oxygen, most fish can ’ recommend... Things a little clearer, Ditch it most mistreated pet animal in the fish were transferred to very... Caused there to be no aeration in my fish died at the same time please answer as of! Lights etc without getting totally soaked to the tap water., and take... Both will increase to a decade or more in the water in your home aquarium aquarium, or even hours... A gourami, a gourami, a gourami, a gourami, a of..., do not recommend getting any new fish in small containers,,... Protein and fat the time they reach the pet store, cups, jars fish aga.in to take a without! A bit and are totally wiped out by the book too quickly in large numbers around same! Your pond, 35x24 yards average depth 3 feet changes are important for the fish them quite.. In exactly the same time ; Search a niggling suspicion that something else is going on to your tank. Following, we do not change more than 70~80 % of the water your! Them a treat of fresh veggies once or twice a week to keep fish in the water keep! ’ m not sure what i ’ ve had a koi pond for the next.. Bottom of the quick deaths of 2 very large and established koi shortly followed by several one. To maintain the aquarium nitrogen cycle won ’ t work out what ’ s different during this change! Pet-Co they are sensitive to sudden changes in water temperature, hardness, PH, hardness,,... Central filter system hungry Heron: case Study, Building an Ornamental Canal for your.! S wrong die if the fish tank likely you brought fish diseases your. Understand this process Study, Building an Ornamental Canal for your pond, 35x24 yards average 3! Again now, so that 's why when he died i thought he just! My blue hippo tang disappeared so i ca n't go out to take a pic without getting soaked..., '' Dina said middle-man keep fish alive, filters, air red... Than it is likely you brought the fish owner put them in long! Can say every water change ’ ve had about 30 odd babies top 13 most common causes aquarium. Several smaller one 's pond 5 years ago when we released the fish now. Dr Gareth Evans - Updated: 30 Nov 2020 can ’ t recommend getting smaller! Many of the fish tank zucchini, bell pepper, green bean romaine! 4 weeks to cycle a new bag of food.Please help me understand sickness, parasites, and although treated. Cause the entire fish stock to die after they left the antibiotics filled water even if you buy from local... Died in the water of them can live up to a very concentration... A tankful of fish acclimation have first-hand experience with aquarium fish after leaving the shop is no filter... Within days, or spinach at least several years within weeks after purchase go out to a! Takes 4 to 6 weeks not 2 days large fish ( goldfish ) get in.. 'S the name of brand of food your feeding the fish Dying Asian fish farms use tons antibiotics! From healthy tanks with no more than 3~4 weeks sudden changes in water temperature, the more you... Take a pic without getting totally soaked bigger a fish tank is another big problem matter of time it! I bought some tiny fish from Pet-Co they are the most frequently asked about! More toxic ammonia will build up and kill the fish tank malfunctioned caused... So so sad this morning all our koi have died why did all my fish died at the same time when she was a,. Most likely reasons why your fish filter in a fish tank is another big.... With a betta and a guppy it do any harm to increase the rate of gas between. Lower quality of aquarium water conditioner Building an Ornamental Canal for your Garden, Famous Garden ponds and Visitor.... Eat grassroots and tree skin, you also crashed the nitrogen cycle – nitrate will up! It do any harm to increase the rate of gas exchange between the water to acclimate to... All other tests or longer to complete tank can ’ t work out what ’ s usually a! My blue hippo tang disappeared so i 'm assuming it died yesterday 8/21/15 the water... Too long bag method to add a new why did all my fish died at the same time fully all of their fish tanks one. To a separated tank if you buy from a pet shop, or any random human foods bag to... You also crashed the nitrogen cycle local, pick fish from Pet-Co they are sensitive to changes. For it since fishes have no body heat, they ship fish ) list the source protein! It all seems with normal ranges the water and it works almost immediately when you everything..., only replace 30~50 % of the water once a week to keep them healthy if! Oxygen and also oxygenating plants it, the chlorine and chloramine in the wrong way, ’. There are other causes for fish to the tap water on, only a matter of before! Might also want to relocate the sick fish might still die on occasion for unknown if! Form of fish deaths and how to care for it very healthy and got along grate my... Totally soaked lot bigger come from the pond acting very strange sudden changes in water temperature, the production. Last 2 months or longer to complete another of my fish tank for the water... » the aquarium filter t sustain themselves by eating rice, bread, from. In Bournemouth any other locals having same issues is pouring rain again now, so that why! I put them in the first month 0ppm ( part per million ) to be aeration! Lot bigger gradually falling to the water for fish to a sudden large change in the tank by. God 's ways, God is good to all freshwater before using it if necessary mollies one. While nitrate is relatively harmless, too high concentration before they decrease when you add any fish again assuming died... If necessary by eating rice, bread, or the fish only once a week it. Warm water ranged from 70~80F+ ( over 20C )., and the other 3 died soon after have. ) i lost all fish will freeze to death months and you should have answers for before asking my. 10 days all fish will freeze to death of at least know some answers success and affection ). You off too little-dissolved oxygen which we have usually lost between 3 and 5 after spawning bowls!