I just bought a new cichlid two days ago, I noticed today that there's white cotton stuff on his mouth, other than that everything else is fine with him, he does hide alot too. Im new to the cichlid world, what should I do? salt, meds??? I dont want all my fish to get sick and die.....no other fish are affected...well some of the fish I pickedup from the LFS their fins were not looking to great, but I think they werent being feed and the small tank was way overcrowded, and they were starved....but the fish in question i picked up from petsmart and seemed fine untill this morning please help.