DI RESIN FOR REVERSE OSMOSIS， REEF AQUARIUM GRADE</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>ECONOMY NON COLOR-CHANGING， USE TDS METER AND SAVE MONEY</li><li>VACUUM SEALED IN MYLAR BAGS TO PRESERVE FRESHNESS AND SHELFLIFE</li><li>ONE POUCH FILLS STANDARD SIZE 10" DI CARTRIDGE PACKED TIGHT， 7.5 lb is 6 re-fills</li><li>HIGHEST QUALITY VIRGIN NUCLEAR GRADE MIXED BED RESINS FOR ZERO TDS</li><li>SPECIFICALLY PACKAGED AND DISTRIBUTED FOR AQUARIUM USE</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/41SQkWAR-7L.jpg' noproxy></br>