my armatus was fine intill this morning. hes 6 inches and not skinny at all. now hes up near the top and pointing upwords. it seems like hes gasping for air but I know I have enough filtration in the tank and I did a waterchange yeasterday. have him in with a stingray and another smaller armatus and everyones fine but him. I was feeding him frozen foods like silverside and ate like crazy. he seems to be wabbaly too. is there anything I can do? will he snap out of it? please help.