Bio Sponge Filter

Double Sponge Bio Filter with Media box

5 FILTER SERVICE KIT INC 2 CLEANING PADS BIO TANKS ORB. COMPATIBLE WITH BIORB

4 COMPATIBLE WITH INTERPET PF4 FOAM SPONGE REPLACEMENTS POWER FILTER FISH TANK

Premium Sponge Filters: BEST Biological & Protection. AAP Filter Max

Cascade 170 Internal Aquarium Filter Replacement Bio Sponge - LOT OF 5 FILTERS

Penn-Plax Cascade 170 Internal Filter Replacement Bio-Sponge Fish

Triangle Sponge Filter For Aquariums 3 Pack