How many fish can you have in a tank?


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All Answers (4)


The old school answer would be 1" of fish per 1 gallon of water. That can lead to overcrowding and excessive waste products in your tank depending on the nature and requirements of your specific fish; but it can be a rough starting point.

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Marietta H.

I was told the general rule is that you can have one inch of fish per gallon of water that the tank holds. But you still need to consider the types of fish and whether any are aggressive when buying fish....Read More

Garry V.

It depends on the size of the fish and the size of your tank, of course. Some aquarium enthusiasts will tell you that you can accommodate one inch of fish with every gallon of water. I'd suggest you also consider how many plants and decorations, etc. you're using. Your fish should have room to swim....Read More


well, i know you can fit about 378 goldfish in a bathtub. Next time I want to see how many I can fit in a hot tub. I will keep you updated.

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