Ok so i keep on about the same thing, but im really scared to treat incase it harms my fish. My fish have been flashing on and off since about a month ago when i.upgraded my tank. No obvious signs of any disease, everyone is still active and have a good appetite. Ive now narrowed it down and can only see it being skin/gill flukes. Flashing, some red gills, and one fish has small.black dots and online it says thats where the flukes would of been? I have fluke solve which is powder form of the ingredients in prazipro.. It says online.it's pretty safe and doesn't harm bacteria in the filter but i.still worry! Am i at real risk of starting to lose fish now?