Hello, I have 2 percula tank raised clowns that got ich shortly after I bought them. I have gone thru the process of hypo, and am glad to say that they are doing great! Another week and I know for sure if it's all gone. I had a maroon clown die from it, before I knew about hyposalinity treatment. Do a search on this site and you'll find all the info that you'll need to do it successfully.
Hope this helped.