Powdex® powdered resins are made from functionalized, crosslinked styrene-divinylbenzene copolymers that create two types of very pure, highly regenerated powdered ion exchange resins: strongly acidic Powdex cation and strongly basic Powdex anion resins. The flocced fine resin particles in Powdex resins provide superior kinetic, hydraulic and filtration properties that offer a high suspended solids loading capacity with excellent permeability and long run lengths. The fine particles and floc structure supply a large surface area that efficiently filters suspended solids including colloids and color bodies.