Question

the number of small fish you can keep in a 20 gallon tank can be expressed as

Answer 1

[AI-generated answer — Bot GPT 3.5]

a general rule of 1 inch of fish per gallon of water. So, in a 20 gallon tank, you can keep up to 20 inches of small fish. This can vary depending on the type and behavior of the fish, so it's always best to research specific species and consult with an expert before stocking your tank.