Joined: 28 Jan 2009 Posts: 209 Location: Cork, Ireland
Posted: Thu Feb 23, 12 3:10 pm Post subject:
I have seen this on occasion in Rainbow Trout fisheries and on my own aquarium fish. Saprolegni is the name I believe and most waters contain some form of this mould/fungus. We treat the aquarium fish with methylene blue, don't know why it occurs but poor water quality and stressed fished probably makes them more vunerable to it.