Available for both 3/8″ and 1/2″ Airline sizes. Windmills and EL2 Electric Aerators use 3/8″ Airline. HD Electric Aerators use 1/2″ Airline.

An Airstone Diffuser is recommended for use with Koenders Windmills and Electric Aerators. It increases the aeration effect by up to 800%.

A Foot Valve is used in conjunction with Koenders Airstone Diffuser to prevent the back flow of water. Requires 3/8″ airline.

This kit includes both the Airstone Diffuser and Foot Valve for a discounted price.

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