Well, we need to educate the LFS on best practices. They should be the one to stop spreading the ich. We have more than few LFS sponcers. We should start skin scraping their live stock and help them not spread it more. I heard certain store in Milpitas had huge really bad ich outbreak last year, but we need to ask them following. Was All the water changed? Did you keep system without fish for 8 weeks ? I bet answers to above is NO. so ich would be present today in those tanks and will be spread to your tanks. Now, I think we should have a certification agency that routinely checks these stores for infections and give LFS ratings, just like food industry. And if standards are not met then revoke the license until they fix the problem. It's a common sense to stop the source from spreading than finding cures. 8 weeks QT is a must too.