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How many fish can live comfortably in a 20-gallon tank? You can, theoretically, keeptwenty 1-inch fish, or ten 2-inch fish, in a 20-gallon tank. This stocking strategy follows the 1 inch of fish per gallon of water rule.
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Can you put a fish in a 20 gallon tank?
Although a 20-gallon tank does offer a fair amount of space, whatever species you choose, the fish must have plenty of room to swim and turn around. For example, extremely active, large fish such as Roseline Sharks need a tank that allows them adequate space to shoal and moves around freely.
How many fish per gallon of water?
The general rule of thumb is an inch of fish per gallon of water. This is the adult size of the fish and not when they are youngsters. Too many fish can cause them to be stressed and lead to an outbreak of disease. So it is really important that you do not overstock but rather under stock your tank.
What animals can live in a 20 gallon tank?
While fish are likely the most popular fish you can keep in a 20 gallon tank, there are a variety of mammals, snakes, lizards, and amphibians that you could stay in a 20 gallon tank. For more information, check out this article about other animals that can live in a 20 gallon tank.
What size filter for a 20 gallon tank?
This means that a 20 gallon tank needs a filter rated at 80 gallons per hour at the bear minimum. It is always safer and my recommendation to go for a higher volume filter.