Aquatic Experts Aquarium Polishing Filter Pad, Water Polishing Pad for Aquarium Filters, Filter Floss for Fish Tank Filters, (50 Micron, 24" x 36" - 2 Pack)SPARKLING CLEAR WATER: Our 50 micron filter pad has a dense fiber network to effectively trap large to fine particles floating in your aquarium water to produce sparkling clear water. CUT TO FIT This 24 inch by 36 inch by 1 8 inch thick filter pad can easily be cut to size and will save you even more money over purchasing ready made pre cut filter media. Our polishing pad can be used in wet dry filters, sumps, aquaponics system, and much more. WATER