ITEM NAME:100% Two Layers Foam Cotton Pad Mat Media for Aquarium Fish Tank Supply HOT SALE AUD 3.12 57+ sold AUD 1.66 12+ sold AUD 7.75 9+ sold AUD 20.11 9+ sold AUD 13.14 9+ sold AUD 1.6 8+ sold AUD 1.4 6+ sold AUD 13.36 6+ sold AUD 15.42 5+ sold AUD 3.39 4+ sold AUD 2.96 4+ sold AUD 2.55 4+ sold Description&Preview.This product is suitable for sea water cylinder, fresh water tank, water straw cylinder, size can be freely cut. Biochemical cotton is used to decompose waste and feed residue and improve water quality filtration.