As far as cats I'd get 4 or 5 spotted pimcats, they never stop moving, and if you get them in a group they will stick together and chase each other around the tank constantly.

Burbotman;3829699; said:A few different types of polypterus would be a great addition.
Jkessler623;3829821; said:get some shrimp or other little invertebrates...those are always fun![]()