Ted,
You nailed the cleaning issue on the head. We have found our customers misunderstood the self-cleaning and I can see why. We are pushing the fact that calcium deposits are cleaned off the diffuser membrane by the expanding and contracting of the EPDM rubber.
But as with any diffuser, the organics will build up and a simple sweep of the hand over the diffuser membrane cleans it off.
We have looked into all kinds of methods of eleminating this problem from bottom boat paints, acrylic paints, electrolisis and even a biocide (not labeled by the EPA for aquatic use) that took care of that idea, and have not found a way to prvent orgainic build up.
