Replacement Filter Foam for Fish Mate 500 GUV and 1000 GBIO Pond Filters

Pond foam collapses after two or three seasons and stops trapping the fine solids that keep water hazy, however often you rinse it. Fit fresh foam and leave the old set in the pond for a week so the bacteria transfer across. Fits the Fish Mate 500 GUV, reference 226, and the 1000 GBIO, reference 228.