ive purchased a bamboo shark about 5 days ago now and he has sence developed the infamous red rash. i thougt my substrate was fine enough only because i have another one which ive hatched thats about 3 and a half months old. today i put a finer sand in the tank but of course i cant see much right now. perhaps sum help from the pros.:help: can this kill her?? do i need to medicate ?? now my male(the old one) has been turning over and rubbing his back on the bottom. im going to assume this is from the sand setteling on him and not parasites. any help plz...:help1: