Worn, Torn or damaged membranes can cause too much air to escape from one diffuser plate and not work on the other plates. Which will cause the aeration system to be less effective.
Now we have just the rubber membranes which are Teflon coated to keep the growth from forming on the membrane.
You will need to re-use the rubber retaining rings form the old diffuser sticks. Sold in lots of four for upgrade and or replacement.
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Darrell Rhoades is the founder of Whatpond.com. A one man business, works full time in tool & die. It all started when he built his own pond for the family. Ran into pond issues and started the research with pond suppliers and conferences for pond management. He writes about pond building and pond management and sells pond management supplies, aeration & fountains and Practical hands on experiences at Whatpond.com. . No physical store, but has items in stock.
Certified Fountain & Aeration Repair