The AquaFX Anion DI Resin CC Refill is a crucial component for any high-performance reverse osmosis deionization (RO/DI) system, specifically designed to produce laboratory-grade, 0 TDS water for saltwater and reef aquariums. This color-indicating resin changes from blue to amber upon exhaustion, providing a clear visual cue for replacement and ensuring consistently pure water. It works diligently to remove remaining contaminants that bypass the RO membrane, delivering the ultra-pure water essential for sensitive marine environments.

Manufactured in the USA, this Anion DI resin is charged with Hydroxide and features a robust Styrene/DVB polymer structure in the form of spherical beads. It boasts a total capacity greater than 1.0 meq/mL (OH Form) and a water retention rate of 55 to 60 percent. The resin's functional group is Trimethylamine, ensuring efficient removal of anions like phosphate, silica, nitrate, and sulfate. Its uniform bead size and high sphericity contribute to optimal flow and performance within DI resin cartridges.

This refill is indispensable for serious reef and saltwater aquarists who demand the highest water quality to prevent common issues caused by tap water impurities. When used in conjunction with a Cation resin and a mixed bed DI resin, it guarantees a complete removal of all dissolved solids, eliminating potential water quality problems and fostering a stable, pristine environment for corals, fish, and invertebrates. Maintaining 0 TDS water is paramount for the health and success of any delicate reef ecosystem.