- 150 g- For fresh water- Eliminates toxic nitrate- Rechargeable- Effectively treats 75 U.S. Gal. per charge- Polyethylene jar with colourful labelNitrate RemoverFluval Lab Series Nitrate Remover is a high capacity laboratory developed ion exchangeresin. Developed from a pure high grade strong base anion exchange resin, NitrateRemover rapidly and selectively removes nitrate and eliminates toxic nitrite in a matterof hours, resulting in a healthy environment for your fish. Safe for fish, plants and invertebrates Will not affect pH or hardness Does not contain phosphatesResin can be recharged several times. Removes up to 25 mg/L (ppm) of nitrate in a 50U.S. Gal. (189 L) aquarium.For freshwater use only.Suggested Media Placement105, 205, 305, 405, 104, 204, 304, 404, 103, 203, 303, 403: Mid, or Upper Level Media BasketsFX5: Bottom or Middle Media Baskets