Aquarium Fish Per Gallon. One of the basic and most common rules for keeping the number of fish in a certain tank is known as the One Inch Per Gallon Rule. Going by the numbers however you can put up to 8 to 10 fish in a 10-gallon aquarium tank.
There is a weird rule of thumb in the hobby saying that you can keep one 1 inch of fish per gallon of water. Some fish owners go by the rule of 20 gallons of water per fish. A The first way is to use the recommended method.
There are 3 ways that you can figure out how much gravel you need for your aquarium.
It can be a good way to think about your fish-to-water volume ratio but of course there are exceptions to every rule. The total number of fish to stock in your aquarium depends greatly on the size of your aquarium. Many aquarists interpret the rule to mean that for every gallon of water in your aquarium you can stock one inch of fish. Determining How Much Gravel for Aquarium.
