This Orenda scale control and metal chelant is a proprietary, patent pending, non-phosphorus containing aqueous formulation for control of carbonate scale and metals staining in recreational water systems. Applied as directed, it is compatible with materials of pool and spa construction and other treatment chemicals applied in accordance with manufacturer's recommendations. It is especially effective at controlling salt water generator (SWG) electrode scale formation without contributing orthophosphates to the water which inhibit chlorine sanitation and act as nutrients for algae growth. Features calcium and metal stain reducer. Contains no phosphorus which contributes to algae growth. Calcium scale prevents and removes calcium scale from pool surfaces. Metal stains prevents metals from staining pool surfaces. Salt chlorine generators prevents scaling which extends cell life. Patented formula nontoxic, nonhazardous, economical. Great for startups stop calcium buildup before it starts. New pool startup initial dosage are 1-quart per 10,000-gallons when pool is full. Maintenance dosage 6-ounces per 10,000-gallons every other week. Comes in 1-quart container.