Pond Zinger &trade; - Applied Polymer Systems, Inc.- Award Winning 100% plant, fish and wildlife safe algae control for water gardens and features! An environmentally friendly way to turn green ponds clean. Great in combination with beneficial bacteria! Easy to install, just place the Pond Zinger near a waterfall, below a floating fountain, above an aerator or any area where the water is flowing. Pond Zinger treats ponds 500 to 12,000 gallons in size. Can last up to 30 days or longer! The Pond Zinger reduces Phosphorus levels by 75-85%. Pond Zinger has received Pond Trade Magazine's 2011 Product of the Year Award