Any issues with your chalceus? Mine is in my 55G growout with a couple 2" sevs and 3 tinfoil barbs. It's incredibly jumpy, though it seems to be a bit better with the tinfoils in there. Not sure why, the other fish don't pay it any attention. Before I got it it was in a tank with some rougher company (salvini, con, RD/midas, and others) so maybe that's where the jumpiness comes from?