A friend has about a dozen black molly fry in a five gallon aquarium, and she's cycling the aquarium with the fish in it (I know it's a heavy load, so she's been doing daily 50% water changes and checking parameters constantly. Ammonia went to 0 just this morning). She hasn't been feeding them a whole lot to try to keep waste to a minimum. I just saw the fish today and I'm worried that they may have contracted something. Most of them are very skinny with swollen gills, and one of them is particularly skinny and has a white fuzzy growth coming from underneath its head where the gills meet. I'll try and get a picture right now, but I'm not very good at photography.
Any thoughts what this might be and what we can do to treat it?
Any thoughts what this might be and what we can do to treat it?




