Hagen Fluval Lab Series Nitrate Remover

Fluval Lab Series Nitrate Remover is a high capacity, laboratory developed Ion exchange resin that safe for fish, plants and invertebrates. Developed from a pure High Grade String Base Anion Exchange resin, Nitrate Remover rapidly and selectively removes nitrate and eliminates toxic nitrite within a matter of hours, resulting in a healthy environment for your fish. It removes up to 25 mg/L (ppm) of toxic nitrate per 50 US gal. (189L). It does not contain phosphate, will not affect pH or Hardness, and can be recharged several times. For freshwater use only.