Hello all, This is my first post. I've been reading along for some time now and this is the first time I really needed some help. I've been fighting infection, both ich and velvet for about 4.5-5 weeks now, and I'm losing. I have a 72 bow with a XP3 canister, a prism skimmer, A 9w double helix, 135 lbs of live rock, and 70 lbs of live sand. Livestock includes a snowflake eel, huma trigger, fiji blue spot puffer, yellow tang, marroon clown, and two tank raised clowns(plus snails and crabs). I've been using Kent rx-p, Melafix, Poly-Ox, Coral Vital, and Garlic Guard. My tank is about 3 months old and water quality is good. I do regular water changes(5-10 gallons per week). I don't know what else to do and fustration is setting in. Any help would be appreciated.