Without knowing the tank size, and the other fish species in the tank, it is impossible to answer directly. But, I can provide some info on the Giant Danio [scientifically the Devario aequipinnatus] to start you off.
This is a shoaling fish, meaning it must be kept in a group of at least 6. Since it attains 4 inches in length, it needs space, a 4-foot in length tank (55g) or larger. It is said to be a bully to other fish, so depending upon what they are, you may have trouble even in a larger tank.
This species will get added to our profiles, but isn't there yet.
Last edited by Byron; 02-11-2011 at 05:33 PM..