The AquaFX MixBed DI Resin CC Refill 7.5lb is a premium, color-indicating deionization resin specifically formulated to produce ultra-pure water for saltwater and reef aquariums. This essential component of any reverse osmosis/deionization (RO/DI) system effectively removes remaining total dissolved solids (TDS) after the RO membrane, ensuring your aquarium water is free from impurities that can harm delicate marine life.

This Made in the USA virgin resin blend of cation and anion deionization resins is nuclear grade, achieving an ultra-pure 18 Mega Ohm resistivity. Unlike recycled resins, it guarantees no introduction of heavy metals like copper into your water stream. Its unique color-indicating feature changes from dark blue to an orange or rust red, clearly signaling when the resin is exhausted and requires replacement, providing visual assurance of water quality.

Trusted by reef hobbyists and used at major aquarium shows like MACNA, this DI resin is ideal for anyone seeking laboratory-grade water quality for their marine environment. It is perfect for refilling AquaFX RO/DI systems and is fully compatible with any RO/DI unit that uses a refillable filter shell, including popular brands such as BRS, Spectrapure, Vertex, and IceCap, ensuring consistent zero ppm water for your aquarium.