Our Sock Hybritek Sumps have this style sponge and here are the replacements. The sponge can be ordered in many ways. The sponges measure 1.5" thick and 3.5" tall and...
High quality U.S. made black reticulated foam (20 PPI) designed to fit the Seachem Tidal replacement filters and CNC machined for a precise fit.
Replacement Filter Sponge for Aquatop Internal Filters (IF-201-204)