Help

[Api]

THANK YOU!! *Worships amphiron*

[Wire Man]

You actually have a lot of options with a 20 gallon. It all depends on what you like. If you like weird and possibly dangerous, but not much movement, try to find a Thalassopryne amazonica (prehistoric monster fish). Or you could go with 4 dwarf pufferfish. They're active, smart, and will murder anything else in the tank.

There are always celestial pearl danios too. Very pretty, very small, and very rare. They're not too difficult in an established tank.