Replacement cartridge
Replacement cartridge for Waterway filter.
Original replacement filter.
Although the filters are washable, very well is recommended to replace the filter regularly.
The 25.sq.ft. for pools up to about 15m3 (pump capacity up to 6m3/h).
The 50.sq.ft is for pools up to about 30m3 (pump capacity up to 12m3/h)
The 25 and 50 sq. ft. have the same external dimensions and are thus interchangeable.