Hi guys me again, was doing a WC today and after I was finished, I noticed one of my female WC geos swimming as if she had swim balder. Moved to hospital tank and she was fine swimming normally. I noticed from what I've researched she has hole in the head, she was a late arrival to the tank, so the whole tank was treated for internal parasites (mainly it was for my wild caught ray pup) before she arrived. Is octozin a ray safe treatment? Cos I'd like to treat whole tank again, as clown loach were late arrivals as well so need treatment. I've read that it states it's safe for all fish but wanted to double check Before doing so. Tia