Poly Bio Marine Products APM1212 Poly-Bio-Marine Poly Sheet Filter Pads for Aquarium， 12 by 12-Inch</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Poly sheet is highly adsorbent chemical filter media pads quickly and efficiently remove impurities， medications and phosphate from aquarium water</li><li>Use in conventional power filters， under gravel filters， the chemical filtration compartment of canister filters and wet/dry filters</li><li>Simply cut to any size or shape to custom fit any aquarium filter</li><li>Rapidly improves water clarity and actively removes harmful organic and various inorganic waste buildup for several months</li><li>Measures 12-inch length by 12-inch width</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/31PNbD7EnZL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31oH2ONfnIL.jpg' noproxy></br>