Replacement Filter Foam and Piston for Fish Mate 2000, 3000 PUV and 3000 PBIO Filters

The foams do the mechanical filtering and the piston squeezes them when you work the cleaning handle, so they wear as a pair. Foam that has gone soft or crumbles at the edges is past rinsing back to life. Fits the Fish Mate 2000 and 3000 PUV, references 266 and 267, and the 3000 PBIO, reference 271.