Hello, I have a reef tank about 5 months old. I have been very diligent about doing everything correctly and not cutting corners. All water levels are good and I test regularly. Regular water changes as well. The longest I have gone b/w water changes was 3 weeks but I usually do ~%20 every 2 weeks. I have some coral in the tank along with inverts and a handful of fish. About a month ago I purchased a coral beauty. A few days later I noticed a few white spots so I took it out and brought it to the LFS to check it out. He said it was a very small ich infection and that as long as all of my other fish are well established they will not contract the disease and that it was ok to put the coral beauty back in the tank. His assumption was that it was stressed from the moving from fish store to home tank but that it would go away. It did go away for a few days. Then it came back with a great vengeance. All of my fish have ich; 3 clowns, a tailspot blenny, coral beauty, and the mandarin. I have a Chromis that is showing no signs of sickness because hes a trooper beyond doubt. So every fish is sick besides the Chromis. I tried Prazipro but maybe I used it wrong because they are still sick. Most of these fish are too hard to catch and qt and I dont have an established qt anyways. All of the fish have been eating well which i guess is a good sign but the ich is not going away. I am looking for an effective method to get rid of this ich without having to remove the fish. Unless of course they die. Also, a large concern I have is if worse came to worse and the fish die how can I get rid of the ich in the tank so it doesnt happen in the future? I understand that ich is "always" present in a tank but it must be in a lesser quantity than the amount I have.