We have a MAJOR problem! ICH!!!!!! and only 3 fish left. After talking to the shop we bought this vile fish from...here's what has been tried. Charcoal/carbon in LARGE amounts, lights off, temp up, UV sterilizer, Natural/organic ich killer and a freshwater dip. Any other ideas from here that we can try? Here's what happened... Up till a week ago last Friday, all was GREAT in our tank until that Saturday when we noticed all of our fish had ich BAD! My wife called the place where the fish was purchased and it was admitted that his system had ich and "eh, you'll have that." We didn't have a hospital tank at the time (but do now). So far, we have lost over $350.00 in livestock. We were even sold a cleaner wrasse and a cleaner shrimp because we were told they would take care of it. ALL we have left is a yellow tang, lawnmower blenny and a perc that isn't going to make it thru the night. We have since bought a small tank set up to use as a hospital tank for now and will eventually change over our 40L into a hosipital tank instead since we are going to start putting up the 220 next weekend. Unfotunately, we had received a lot of misinformation from this same source since this whole thing started and have definitely learned who to trust and who not to trust in this hobby.