API® POND CHLORINE & HEAVY METAL NEUTRALIZER instantly makes tap water safe for pond life by neutralizing chlorine, copper, lead, and zinc, in addition to other heavy metals which are toxic to fish and plants. This super concentrated solution treats 600 gallons of pond water with just one ounce of dosing, and assists in making pond keeping and maintenance easy and effective all season long! Use the dosing cap on the bottle. To remove chlorine and detoxify heavy metals: add 5 ml. per 100 gallons of pond water, or add 0.25 cup for each 1,200 gallons. To remove chloramines: double the dose. Use when filling a new pond, or adding or changing water in an established pond.