The Oase SwimSkim effectively skims leaves, food remnants and other pollutants from the pond surface. Unit includes pump of 2500lph with a pond skimming area of 25m2. Whirlpool function stirs up pollutants from the pond floor while the aeration function sends oxygen deep into the water to aid fish health and assist in growth of healthy pond bacteria. Skimmer basket can be easily emptied. Unit size is 332mm x 297mm x 250mm, aeration function 300lph, 40watt. 10m cable. 2 year warranty.