I read up on the other posts about spot-like diseases on people's fish and I think I've ruled out ich but I don't know if this is lymphocytis or a fungal disease, if the picture isn't too clear, it's a powdery sort of soft grey spot along its body, it hasn't caught on to any other fish but I recently introduced two rams that I hope aren't susceptible. I haven't seen it rubbing itself against surfaces and it seems to be breathing OK. (The one above is Tap, he kept on moving out of focus but Cherry wasn't camera-shy)
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