i have two black moor fish and they have started to get long furry white things growing from their body!! i am unsure of what this disease is and would be grateful for some answers?? i was told in the pet shop it may be cotton wool disease and was advised to do a half water tank change and use fin rot and fungus control!! the best way to describe what it looks like is as white/gray spikes coming from mostly the back end tail area of my fish!!