You can have five African dwarf frogs in a 10-gallon tank. African dwarf frogs are tiny and only grow to be around 2.5 inches. Due to their small size, these frogs don’t need a lot of space to thrive. As a general rule, an African dwarf frog only needs around 2 gallons of water in the tank.
However, this rule only applies if you have a species tank and keep only African dwarf frogs. If you wish to keep African dwarf frogs in a community tank, you should prepare a 20-gallon tank or bigger, depending on how many frogs and fish you’re keeping.