Kolar Labs - DI Color Changing Deionization Resin – for Fish Tanks, Ponds & Aquariums, Reef Aquarium Grade (567 Gram, 1.25lbs);

Lewatit NM-65 is a premium grade, gel type, high capacity, color indication mixed ion exchange resin prepared with a 1:1 chemically equivalent ratio of cation to anion resin. Lewatit NM-65 is a mixture of gel type cation exchange resin and a standard cross-linked gel type anion exchange resin. The mixed resin is prepared from component resins which have been manufactured with the highest degree of purity and conversion to the H+ / OH form. Lewatit NM-65 is specially manufactured with a color indicator to visually show the exhaustion wavefront of exchanged ions during standard downflow service in cartridge application.