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Number of Fish Per Gallon

How many fish should be there in a gallon of water?

About 1 adult fish of 1 inch of size.

When stocking an aquarium, a general rule of thumb is to have 1 gallon of water for every inch of adult fish. This can be traced to the book ‘Å“Tropical Aquarium Fish’ by U. Baensch published in 1983. This is just a general rule however, and other factors beside size should be taken into consideration for the living space needed by fish, such as activity level, growth, and so on.

This fact is verified on : April 4, 2010.





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