SecondNature Trickle Sponge Whisper® 3000 and 4000

Tetra has a huge selection of Whisper® filter parts, like the SecondNature Trickle Sponge for the Whisper® 3000 and 4000 filters.
Product No. 25070-00
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Second Nature Trickle Sponge - Fits WDF 3000 and 4000