My lfs had somoeone drop off a good size teenage african chiclid and pleco. I brought home my new fish and quarentined them. I put them i large contaners ans let them aclimate. My pleco, beastly, is doing awesome but my african chiclid is swimming with his belly on the side of the tank and tail up. He has just resently started to do barrel rolls when I do water changes. Could he be sick? Or dying?