Kolar Filtration DI Resin 7.5 lbs (3.4kg) is a premium mixed bed deionization resin specifically formulated for saltwater aquarium applications. This high-capacity resin is designed to effectively remove remaining total dissolved solids (TDS) from reverse osmosis (RO) filtered water, consistently achieving a pure zero TDS output. It is an essential component for producing the ultra-pure water necessary for thriving reef environments.

As the exclusive North American distributor for LANXESS Lewatit® NM-65 DI Resin, Kolar Filtration provides a trusted German-manufactured product known for its quality. This gel-type resin features a 1:1 chemically equivalent ratio of cation to anion resin and includes a color indication feature to signify exhaustion. Each 7.5 lb (3.4kg) package is vacuum-sealed in Mylar bags upon arrival, ensuring guaranteed freshness and optimal performance. Approximately 640g (1.3 lbs) of this resin is sufficient to densely fill one standard 10-inch refillable DI cartridge for best efficiency.

This DI resin is ideal for discerning aquarists who already utilize a reverse osmosis system and seek the highest level of water purity for their reef tanks. By consistently producing zero TDS water, it helps prevent the introduction of unwanted contaminants that can fuel nuisance algae growth and negatively impact sensitive corals and invertebrates. Regular monitoring with a TDS meter is recommended to optimize resin life and ensure continuous ultra-pure water production, making it a critical addition for maintaining a pristine and stable marine ecosystem.