Big Vine mentioned getting a calvus for population control in my african paludarium thread, and i was wondering if anybody had experience with keeping calvus. i've been reading up, but want to make sure my tank would be right for one. i am worried about one going after my shell dwellers, but i really need to keep this julie fry population under control. also, can they be a solitary fish, or do they do better in groups? my water level is kept fairly low, but could easily be raised if it would enable me to add one. thoughts?
