Hey guys, I have a 120L freshwater setup 1yr old airpump, heater, filter Ph 6.6 36 degrees Celsius I have one medium golden severum and a small green severum. for the last few months iv been trying to figure out what disease the fish have it varies from good to worst and iv tried using muti cure and stress coat to get rid of it. I'm just wondering if anyone know what it might be. it is white size up to a grain of rice on the fishes sides and smaller on fins sometimes. Today the larger severum, whom hasn't had the disease for a month or has got with thin patch of something on his fins it's starting to look a bit like a tiny piece of string on the fins of both fish.. ill attach some picture of green severum. any help would be much appreciated.