Pondmaster® De-Clor is an effective water conditioner and dechlorinator that not only removes chlorine and chloramines, but also detoxifies heavy metals and reduces toxic nitrate buildup. De-Clor conditions tap water to make it usable in the pond. Municipal water commonly contains chlorine and heavy metals that, if untreated, are harmful (even deadly) to pond fish and aquatic life. De-Clor removes this threat, and is itself safe for use around fish, plants and wildlife. Treats 1280 gallons.