NRW-37 nuclear-grade resin

NRW-37 nuclear-grade resin is a highly pure and absorbent resin that is used to further purify water that has been pretreated with standard methods (reverse osmosis, vapour distillation, etc). It is a mixed-bed anion–cation resin that absorbs most diluted ions.

This resin is used widely in hobby fishkeeping, especially reef and marine fish keeping.