Many places sell membrane diffusers and say they do not need cleaning. I do not agree and it is always a good idea to periodically pull them up and scrub them off. Numerous types of things can contribute to the pores clogging even as in Snrub's case operating them 24/7 clogging can still occur. Aeration will be a lot better when diffusers are cleaned annually.


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management