We use them in more industrial settings, so the plugging might be from oil type compressors or some process fluids. I think with "dry" air pumps the plugging potential would be lower, but solids / bio-gunk seem to get everywhere eventually. I think part of my issue is water freezing in a low spot, although I also have power issues, so i'm thinking of trying one of these if I can figure out a way to access it. I'm no expert in pond aeration - just trying to apply some things we use for other applications, and following along with others are figuring out.
