year-round

may also want to check out the Kasco RA2 Pond Aerator for similar coverage and lower operational costs

more expensive

Also notice that the deeper the pond

Be sure as well to watch the short video on this diffuser under the product videos tab on this page as well

Kasco Robust Air Replacement Diffuser Surface Aerators year-roundThe Kasco Robust Aire diffuser is the most efficient design on the market, meaning you'll get better turnover and high oxygenation in your pond. Be sure as well to watch the short video on this diffuser under the product videos tab on this page as well. Includes a self weighted stainless steel base. Built in check valve to prevent water backing up in the airline. Includes 3 8" and 5 8" male connectors. Lifetime Warranty