The new oase swim skim pond skimmer is a new innovation in pond surface skimmingr the big brother of the swim skim 25r leaves pollen and other algae nutrients get into the pond water via the surface causing a buildup of waste and blocking your filterr oase skimmers powerfully and effectively extract these dirt particles from the surface collecting them in the basket that way dirt can be removed from the pond ecosystem before it starts to pollute itthanks to the innovative whirlpoo