I have to agree with patty. The interaction and breeding behavior that goes on between frogs is alot more interesting/rewarding that a bunch of diffrent colors in a tank. Its very cool to watch a tadpole hitching a ride on the back of a parent and having something that has been going on for ages and ages in the rainforest right in your living room! A group of 5-6 blue and black auratus are sure to breed a bunch for you in a nicely planted tank. You could even sell offspring for some extra cash(that will most likely go into setting up another vivarium haha).