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39

The most reasonable explanation is that it died and was eaten by the other fish / snails. Note that some snails are carnivorous. Many fish are cannibalistic if the opportunity arises. Some leftovers of the missing fish might be found inside the aquarium, if you look carefully. Or in the filter. Some fish have the idea to jump out of the water. With this ...


18

It is most important that a betta fish have the right environment. If the environment is right, it's easier to treat any illnesses the fish may develop. Your fish needs at least 5 gallons (19 L) (despite what a pet store employee recommends, you can always get a different tank). Additionally, the smaller the tank, the more frequently you need to perform ...


11

Goldfish can live for up to three hours out of water. It also depends on where your goldfish lands. If they landed somewhere moist or in the puddle of water they spilled out of their bowel, they can survive for around three hours. However, landing on a dry surface will kill them in about one hour, due to lack of breathable oxygen for their gills as well as ...


8

Fish swimming with their mouth constantly glued to water surface is a sign that they are gasping for breath. However, the reason for them being short for breath usually isn't the low oxygen concentration in the water itself, but toxic effect of water pollutants: ammonia (NH3), which burns fish's gills and disables them from extracting oxygen from the water; ...


5

The first thing you need to do is to add some aquarium salt, this is done to counteract the effect of the nitrite on your fish' gills. The aquarium salt concentration to use is 0,3%. Do water changes 20% each day until the nitrite level drops, cut down on the feeding of your fish so you only feed twice a week and only a little food each time (this is to ...


5

It will be difficult but not impossible to find a turtle which fits your needs. There are some main factors you need to focus on: temperature and water quality. The temperature will be important for your turtle, the water quality for your fish. You need to find the kind of turtle, which will survive in the temperature region you live in. If you decide to ...


4

First we need to clarify, what is exactly in the bottled water: To make it sparkle, the companies add CO2 gas. (In some dwells this gas was taken by the water, when dropping through the different layers of soil/stone). As long as the water is under pressure, this gas is dissolved in the water. Only around 0.2%[1][3] of this dissolved CO2 will react with the ...


4

Limescale is made of insoluble carbonates of calcium and magnesium; in other words, they are salts of carbonic acid. Salts undergo displacement reactions: for instance, weaker acids tend to be displaced from their salts by stronger acids. In case of limescale it means that it is decomposed by acids stronger than carbonic acid (acetic acid, the main ...


4

If you are using a glass-encased heater then it may help to replace it with plastic-encased heater, glass has much higher thermal conductivity than plastic which means it transfers its heat much faster to anything directly touching it, which is usually water - but in case of prolonged contact it could also burn the skin of a fish; the temperature regulation ...


4

Your fish was most likely to be dead. I recently had a albino hoplo catfish who I loved so much but when a member of my family was changing the water, he died of shock. He was paler than usual and his gills weren’t moving and he wouldn’t shift when I poked at him. The fact that you flushed him down the toilet means that you must’ve taken him out of there and ...


4

High concentration of nitrite ions (1 mg/L of NO2-) is the most concerning thing in the list of your water parameters; it is many times above the toxicity threshold, because nitrites may start to become toxic at levels as low as 0.1 mg/L. Mechanism of toxicity is that NO2- ions get absorbed into the bloodstream through gills and oxidize hemoglobin in fish's ...


4

Too long for a comment, so an answer that might help future readers. How old are the fish? What sex? Sometimes pushing about is male fish trying to squeeze eggs out of female fish. In my experience, female goldfish get eggs round about 3 years of age. Males get breeding tubercles about 1 year. Sometimes biting and pushing just fish defending territory, ...


4

To put all the comments into an answer: You probably forgot to cycle your tank. That's a mistake many fish owners do because pet shops neglect to tell them about it. What "cycling" is and how it works is described in this very detailed answer: How does one effectively “cycle” an aquarium?. Fish becoming lethargic and either sinking to the bottom or ...


4

The existing answer gives a good course of action and one of the comments suggesting the source of the fish (i.e. the local fish store) might be a good one to follow up. Some fish stores even offer a guarantee with their fish (if it dies within a week, they'll replace provided your water quality is fine). Consider changing your fish store for bettas if ...


4

The first thing to check with sick fish is the water quality. As indicated in the excellent answer from Gwendolyn, small tanks need more frequent water changes (even if you're using a pump with a filter). Once a month seems a little infrequent for a tank that size. Personally, for my 1.6 gallon tank, I vacuum the gravel and do a water change of no more than ...


3

It will mainly depend on pond exposure to the sun, it's location and construction, meaning that if you don't have enough water, enough shade and a good ratio fishes-water volume you will need to be extra careful when the sun hits. A good spot for your pond is where it takes sun only during morning. It will give enough light to your plants (4-6hs) and keep ...


3

I am not a expert at taking care of fish but I do have some advice that might help you. Unfortunately, shrimp are at the bottom of the food chain so it’s not a surprise they are getting eaten. I suggest having your tank with plenty of plants. Heavily planted tanks are also good. These plants will help protect the shrimp and will allow them to hide if they ...


3

Water shock especially when they are very stressed or ill already. As you described your fish was already in a pretty bad shape, in that situation you can apply some medicine into the water tank or in a separate tank if there is more fishes. Next time try to watch out water conditions. I'm sorry for your loss.


3

I feed fish mosquito larva whenever I can. I am impressed when a fish that has never seen larva, decides in a couple milliseconds, that it is some thing to eat, and does it. In decades of using larva the only problem I have had is dragon fly larva that apparently came in with mosquito larva. Somehow they avoided fish and ate most baby fish before I realized ...


3

The most important thing a fish keeper should know, especially a new person to the hobby, is knowing about the nitrogen cycle. I do not know if your do know about that already, but I will still give you a link to a website about it. The website will talk about important information like nitrite, nitrate, and ammonia in fish tanks. You do want to set up a ...


3

As long as air can get into the cup and the betta can't jump out of it, yes, the betta should be fine. They are kept in small cups for much longer periods than "overnight" in pet and fish stores, after all. However, as the cup has no more filtration than the tank, there was absolutely no need to remove the betta from the tank unless the water in ...


3

Goldfish are very hungry creatures. They will happily eat your low grade red cherry shrimp. When I was younger, and had no experience of keeping goldfish, my family put 10 beautiful Amano shrimp into a goldfish tank not knowing that goldfish would chow down on shrimp. The next day most of them were eaten. Shrimp are edible for goldfish, as evidenced by the ...


3

Your fish was dead for sure. It often happens that their swimming bladder starts failing because of some illness and then they can start floating on the side or directly stay on the bottom until they die. Also if you were able to grab it to flush it make it much more clear tough.


3

I would say just stopping to feed anything else other than bloodworm should work after some time - hunger is the best spice; if there isn't any other food, then ultimately your fish will naturally get convinced to eat what is available. Fish need surprisingly little food to survive, but will happily eat any available excess that they could physically consume ...


3

THIS IS A MEDICAL EMERGENCY! Your fish may be infected with the viral infection called lymphocystis. There is really no direct cure for it, but your veterinarian can suppress the virus until it eventually stops. Many prayers to your fish. This is a decision you will have to make yourself. As well with that, it will not go away on its own. I would not ...


3

Fish in the pictures attached to your question looks like Gyrinocheilus aymonieri (Chinese algae eater, CAE for short). Chinese algae eater (Gyrinocheilus aymonieri) Image source: Wikipedia. Image source: aqualog.de. Image source: aquascape.ae. Chinese algae eaters are fish from the carp family Gyrinocheilidae (they are the only one genus in it); they are ...


3

My research suggests that it could be possible, but the prognosis depends on how soon have the eggs been removed from the platy fish after it died. Platies are fish from the genus Xiphophorus of the family Poeciliidae. Xiphophorus genus contains 28 recognized species; all of them are called either platies or swordtails, and this distinction depends on ...


3

Other people have talked about possible issues presuming the problem is with the tank setup somehow. But you say you've had your Betta fish for 2 years. In all likelihood, it was already a year + old when you bought it; Betta fish live between 2 to 5 years, and probably the most common symptoms of old age are these kinds of problems, where they get ...


3

It depends on the aquarium size, the fish, and how uninsulated it is, and where in the UK. I easily keep fish in a couple aquariums in a garage room addition and several more in an unheated garden shed. However both are well insulated. Your brick have a lot of thermal inertia so (with doors and windows closed) , the temperatures in the garage should not ...


2

Assuming that we have pure, distilled water at 25 °C: its KH is 0 because it has nothing dissolved in it (more specifically, no carbonate nor bicarbonate ions); its initial pH is 7 (which is neutral pH at at 25 °C). Having said that, we must consider that water - unless it is stored in a sealed and airtight container, which aquarium certainly isn't - ...


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