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Outdoor Water Solutions® 9" Rubber Membrane Diffuser with Base generates a TON of air for cleaner ponds and lakes!
What's even better? The low p.s.i. design, which means your windmill or electric aerator doesn't have to struggle to open up the perforated slits like it would with some rubber membranes on the market. In fact, this is the same rubber membrane used by the water treatment industry to really move the water through its precision perforated slits.
Unit comes with a backflow valve and 1/2" fittings to plug into your 1/2-inch airline. Rated for up to 5 CFM and perfect for lakes or ponds, especially where you're only running one diffuser. Complete with base that can be filled with sand or gravel so it sinks to the bottom of your pond.