Hi, I had clown loaches in my new tank ( bad advice again from my lfs) I lost them unfrotunately due to lack of knowledge about white spot, never occurred tome that fish got ill.), but my remaining fish that caught white spot were treated with Parazoryne and I have to say that I only lost 1 x platy who had developed it quite badly, the other 7 survived and they all had spots. Check though that clowns as a scaleless fish can have this treatment, but it is very good I have also read alot about it on this forum and all who had used it would reccommend it.