Yes I used to own a maroon clown that one morning I woke up and he had ich and out of nowhere I might add, So panicking to save my prized fish I got a plastic cup, a commercial ich remedy( liquid), and put just a little bit of saltwater in it. Then took him into the bathroom and dumped the maroon in a net and the remedy in the toilet, and then rinsed him with matured saltwater from the tank that he came out of and put him back in his tank not only did he survive this harsh treatment, but also recovered from his ich, and lived a full 4 year life which is an average life span for this species.