[MrTuskfish]

Water params dont cause ich. Ich causes ich and neither UV or herbtana will cure or prevent it. You have 3 choices, all of which require a hospital tank; copper, hypo, or tank transfer. Please read the ich stickys at the top of the disease forum, they will tell you everything you need to know. You're missing the most important part of acclimating new fish; a quarantine tank. After you get this problem solved, use a QT with all new livestock, and avoid ich and many other problems. Ich is easy to cure in a QT, very difficult in a DT. I'm afraid your're in for a lot more than just adding a med and it could have been prevented by a simple, inexpensive QT. All of your fish need to be treated and your DT left fishless for 8+ weeks. Also; I'd never consider buying fish from the LFS you describe. I'd bring it to their attention and tell them to give you a call when they start paying attention to their fish.