Pondmaster Large Foam Pre-Filter, Fits DS 950-1800

Pondmaster Foam Pre-Filter for Mag-Drive Models 950 GPH, 1200 GPH, 1800 GPH

This filters serve two purposes, they dramatically increase the filtering ability of a pump, also the size of the foam allows micro organisms to grow inside the filter creating a biological environment. For Mag-Drive Models: 950 GPH, 1200 GPH and 1800 GPH Pumps