Anybody with channels notice any aggression? I've had several in the past and they pretty much ignored their tankmates, even if the mates messed with them. But the one I've got now (8" or so, maybe 10") is a definite fighter...he'll do a bit of chasing, and if any of the cichlids in there mess with him he fights back, biting etc. It's fine now that he's around the same size as his tankmates but if he keeps up as he grows, well I'd better get working on that pond...