hi can anyone help i have keeped redtails for a few years now and hopefully know a little about them now i currently have a 26" one his tank mates are a 24" niger,24"peruno +a 14" disc motoro stingray all are ok apart from redtail here are the symptons he is less active sits on bottom breathing heavyer flicks his finns +flaps his gills every so often +it looks like his sheding his skin it looks like a cobweb but he has not lost his appetite and can move when he wants to he also has a small redish round spot/mark on his belly im thinking its a parasite so i am treating him and the rest of the tank with anti parasite treatment but there has been know change water is good i have a full test kit + i have just turned the temp up on the tank from 27c to 31c how long do you think i should wait to see if treatment is working or should i try something else if anyone can help please do getting worried about him thanks again 