LiquaGen - 2 Cubic Feet of Water Softening Ion Exchange Resin Cation + Resin Loading Funnel Tired of paying hundreds of dollars to high mark up brands to replace your resin? Start saving with LiquaGen's DIY resin. World class lab tested quality resin ensuring great water. High End product without the High End price! Includes a FREE resin loading funnel for super easy/convenient installation. Good selectivity and thermotolerant characteristic Excellent physical and chemical stability An ion-exchange resin or ion-exchange polymer is a resin or polymer that acts as a medium for ion exchange. It is an insoluble matrix (or support structure) normally in the form of small (0.51 mm diameter) microbeads, usually white or yellowish, fabricated from an organic polymer substrate. The beads are typically porous, providing a large surface area on and inside them. The trapping of ions occurs along with the accompanying release of other ions, and thus the process is called ion exchange.