Leaves pollen or other algae nutrients get into pond water via the surface the oase swimskim surface skimmer powerfully and effectively pulls this debris from the surface into the collection basket therefore the debris is removed from the pond eco system before it stresses the pondthe result is clearly improved water quality and viewing depth through a reduced nutrient balance it is suitable for ponds with a surface of up to 25 m2 it has a powerful drive thanks to 2500 litre circulation pu