API Crystal Bio-Chem Zorb Internal Filter Cartridge (4x2 Pack) Size 10-783C</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>8 pack (4x2 Pack) replacement filter cartridges for the API Superclean filter;</li><li>Made with a unique blend of pharmaceutical-grade ion exchange resins， research-grade organic scavenger resins and high-porosity activated carbon;</li><li>Filter removes organic materials including colors， odors， heavy metals， toxic gases and compounds that carbon， alone， can't remove;</li><li>Promotes growth of coral in saltwater tanks and plants in freshwater tanks.</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/51SE8YrHENL.jpg' noproxy></br>