![]() That’s why you’ll need to house them according to their size. ![]() Goldfish tank size according to the type of goldfish you want to keep in the tankĭifferent types of goldfish grow to different sizes. ![]() The number of goldfish you want to keep in the tankġ.When it comes to tank size for your goldfish two things come into play How to choose the right fish tank size for your goldfish? And it can reduce the life expectancy of the fish. This can affect the proper growth and development of the fish. If you keep goldfish in a fish tank then you’ll need to do the water changes very frequently.Īlso, as goldfish can grow pretty large (generally around 14 inches) the goldfish will not have sufficient room to swim around in the tank. What happens if you keep goldfish in a small tank? For goldfish to comfortably live in a fish and to have sufficient space in the tank to swim around you’ll need a big fish tank for goldfish. Generally, goldfish can get around 14 inches in a fish tank. The second reason goldfish need a big tank is that goldfish can get pretty big.Īccording to Guinness World Records, the world’s longest goldfish was owned by Joris Gijsbers and measured 18.7 inches ( source) Generally, you’ll need to do a water change to remove the nitrate because planting a lot of plants in a goldfish tank is not a viable option because first, goldfish are known to eat up the live plants you planted in the tank so most plants will not survive in the tank.Īnd second, you’ll need a lot of plants to get rid of all the nitrates from the tank.Īnother benefit of having a big goldfish tank is that you’ll need to do water changes less frequently compared to if you have a smaller tank. There are two ways to remove nitrate from the tank. Now when the nitrates reach more than the 40 ppm mark then you’ll need to remove the nitrate. Now as goldfish produce a lot of waste in the tank the nitrates can build up pretty quickly in the tank which is, as I said earlier, deadly for the fish.Īnd this is the reason you’ll need a big goldfish tank because in a large tank you’ll have more water so the nitrate will build up slowly or in other words the nitrates will be diluted due to more water in a big tank. Now nitrate is not as harmful to the goldfish as ammonia is but if the fish tank contains a lot of nitrates (more than 40 ppm) then it is fatal for the fish. And this is the reason goldfish produce a lot of waste in the fish tank compared to other fish.Īs goldfish produces a lot of waste in the tank the waste produced by the goldfish breaks down in the tank and gets converted into ammonia then nitrite and then finally into nitrates ( if your fish tank is cycled). The food moves through their digestive system relatively fast and gets excreted out fast. Fun fact: Goldfish have an intestine twice the length of their body.īecause goldfish do not have stomachs as other animals do, they cannot store food in their bodies for a long time. When goldfish consume food, as the food moves through the intestine of the goldfish, it breaks down and the nutrients from the food are absorbed in their body. The reason goldfish produce a lot of waste is that goldfish don’t have stomachs as other animals and humans do! they produce a lot of waste in the fish tank. Goldfish are considered very messy fish i.e. There are a couple of reasons why goldfish need a big tank.
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