amazing thanks, I’m currently on my way to LFS to see if they have formalin incase I need it and a hanna copper. Then will move the clowns to qt and slowly bring the copper level up. I will hopefully update in a few days fingers crossed. Thanks so much for all the help, I feel much better about just moving them for now.I watched the videos - it sure LOOKS like a severe case of ich, but I cannot reconcile the other fish not having ANY spots. What about trying a modified treatment: move this clownfish into a QT and treat with coppersafe. If any other fish start showing spots, move them in also.....that way, if it turns out not to be ich, and is just localized to this one fish, you won't have exposed the mandarin to any harsh treatment.