Thanks for the info, I think I may get one and just use this tank for it (once I get my new tank) until I can put it in the brackish water with my shark. Can you tell me if they are better in groups or alone? I do not really trust my LFS opinion any more because when my son got the rainbow shark he got 2 because they told him that if he got at least 2 of them they would not be as agressive, well we soon found out this was not true, the 1 I still have killed the other one!