Proper pH 7.0 is a buffer and water conditioner that sets and holds pH to 7.0 and also removes chlorine, neutralizes chloramines, adds electrolytes and detoxifies heavy metals. Perfect for use in aquariums containing a mixed variety of tropical freshwater fish. Use when setting up a new aquarium, adjusting pH in an established aquarium and changing water. Not for use in aquariums containing live plants. Treats up to 208 gallons. Shipping weight: 4/5 lb.