The CPF Series pressure filters are ideal for ponds and water gardens up to 4000 gallons. These pressure filters deliver crystal clear water with very low maintenance. All of the CPF filters include an integrated Ultraviolet Clarifier which flocculates (clumps) any algae that passes through the filter. The flocculated algae can then be captured by the filter and removed from the pond. The “Easy Clean” feature of these filters makes maintenance a quick and easy process that can be done without getting dirty. The CPF Filters can be installed anywhere around a pond and can be buried right up to the lid of the filter, which makes them very easy to hide.