Now the benefits that a pressure filter brings to a pond project can be rolled out to large ponds, koi ponds and high waterfalls br they can be positioned buried below the water return area br they can handle high pump flow rates br they are compact br the velda clear control 100 pond filter has a cannister capacity of 100 litres more than twice the nearest competitor. Br it is also equipped with a seven position handle switch which means the filter can be simply turned to clean position andeffectively cleaned backwashed without removal of the lid. Dirty water then exits via waste outlet. Br the other position options include br • back wash valve this position is used to wash away the dirt in the valve br • pond drain used to empty the pond br • filtration standard running position. Br • medicine position water runs back into the pond bypassing the filter media. Br • stop pump can be cleaned, whereas the water remains inthe filter br • winter new the extra new position is a winter setting which actually drops the water within the container by about 2 inches and in severe winter conditions it prevents damage to the rubber sealing ring.the pondxpert ultraflow 16000 br is a trusty pump that is well matched with this particular filter, as is the pondxpert greenstop 40000 55w uvc. Br br saving based on price of buying items separately!