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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