This product is a 5-liter bag of SpectraPure Strong-Base-Anion Semi-Conductor Grade DI Resin, designed for use in reverse osmosis/deionization (RO/DI) systems. Its primary function is to meticulously remove any remaining total dissolved solids (TDS) from reverse osmosis filtered water, producing ultra-pure water essential for the health and stability of saltwater reef aquariums. Achieving zero TDS water is crucial for preventing unwanted algae growth and maintaining precise water parameters for delicate marine life and corals.

This specific DI resin is classified as Semi-Conductor Grade, indicating its exceptionally high purity and efficiency in contaminant removal. The 5-liter bag is equivalent to approximately six standard 10-inch DI cartridges, offering a substantial supply for extended use. It is important to handle the resin in a well-ventilated area, as some resins may emit a strong odor upon opening. Please note that Spectrapure advises against drinking water produced from deionization, as the materials used in DI resins are typically not food-grade approved.

This high-grade DI resin is an indispensable component for dedicated reef aquarists and hobbyists who prioritize the highest quality water for their advanced marine setups. It is perfectly suited for those maintaining sensitive coral species or for anyone needing to replenish their existing RO/DI system with a reliable, efficient resin to ensure a consistent supply of contaminant-free water, thereby protecting their aquarium's delicate ecosystem.