Cassharper, the OP is talking about angelfish (Pterophyllum scalare), not the koi itself.Speezio;1686309; said:i have had my koi angelfish for a while now and he is about 5 inches long. i have just noticed some white growth on his face and it is puffed out. it looks a little like a bite but none of the fish ever mess with him. i will try to get pics up but i don't want to lose him![]()
cassharper;1688029; said:the cottony growth is probably sap. It's very common in Koi. There are lots of ways to treat it, but what works somtimes doesn't work others.
Googles these and see what might work best for you. I try to use these methods before I use other treatments.
Salt Dips
Hydrogen Peroxide Dips
Formalin Treatment
Malachite Green Treatment
Potassium Permanganate Dips (Use this with CAUTION. I usually save this for last ditch effort)