LTWHOME Bio Foam Filter Pad Fit for Tetra 25997 Grid in Tank 20 Internal Filter (Pack of 12) but it will remain odor

but it will remain odor free for the life of the sponge

Packing include: 12pcs blue coarse filters

Each package contains 6 heavy duty floor bonnets

This filter pads is custom designed and manufactured for Danner Pondmaster 190 - 12195

Suitable for all kinds of surfaces and leaves no scratches

LTWHOME Bio Foam Filter Pad Fit for Tetra 25997 Grid in Tank 20 Internal Filter (Pack of 12) but it will remain odorPack include: 12pcs foam pads without plastic frame. Custom designed and manufactured for Tetra Whisper 20i & 40i Internal Power Filter, compare to part # 25997. Provide efficient water flow with less clogging for long lasting filtration. Provides both mechanical and biological filtration. Safe, washable and reusable.