Check the listing for details. NEW 10" Membrane EPDM Disc Diffuser Aeration in Single / Double + Sinking Base!. Condition: New. Listed at 144.99 USD. Features & BenefitsMembrane air diffuser assembly Available in both a single, dual head assembliesHandles airflow from .8 - 3 cfm per head3/4" female threaded outlet located in the base of each diffuser, 1/2" & 3/8" barbed tubing adapter includedSCFM Range: 0 .8 - 3 CFMMinimum Operating Depth: N/AFlow Interference: N/AActive Surface Area: N/ALinear Lift: N/AInlet Size: 3/4"FPT, barbed adapter included for 1/2" or 3/8" tubingPond Aeration Micro Bubble Membrane Diffuser Discs are an important component in establishing and maintaining a healthy pond environment. 10" Diffuser disc produces high oxygen transfer micro bubbles to help keep fish healthy and ponds clear.Includes (2) 10" EPDM Diffuser Disc and powder coated self sinking Steel FrameAeration Pump and tubing are NOT included. ( we sell pumps and tubing as well if needed )10" Diffuser discs produce high oxygen transfer micro bubbles to help keep fish healthy and ponds clear.Increases oxygen levels for healthy and happy fish. Promotes growth of algae-controlling beneficial bacteria.Lowers levels of dissolved toxic gasses and ammonia. Reduces sludge build-up on pond bottoms.Increases oxygen levels for healthy and happy fish. Promotes growth of algae-controlling beneficial bacteria. Lowers levels of dissolved toxic gasses and ammonia. Reduces sludge build-up on pond bottoms. Helps maintain an open-water hole in the ice during winter to release trapped toxic gasses.Helps maintain an open-water hole in the ice during winter to release trapped toxic gasses. Membrane air diffuser assemblies are designed to be placed at the bottom of a pond or lake. These diffuser assemblies feature round rubber (EPDM) membrane diffusers with thousands of holes which produce small air bubbles when supplied with air from an on shore compressor. These bubble rise to the surface and create circulation that helps destratify and aerate the water body.Membrane Diffuser Assemblies Dual Membrane Diffuser AssemblyMolded base allows for strain relief clamp (included) to secure tubing onto baseHollow base can be filled with sand or gravelEliminates the need for bricks and straps to get the diffuser to sinkLow head pressure lossInlet air fittings (included) accepts 3/8″, 1/2″ or 5/8″ tubingDual head handles airflow from 1.6 – 6 cfm3/4″ female threaded outlet located in the base of each diffuser headLow maintenance rubber membrane diffusers produce fine bubbles for maximum lift and oxygen transfer efficiencyAvailable in both a single, dual and quad head assembliesFive year warrantyRecommended Air flow - 1.6 to 6 cfmWeight - 8