Use this realistic looking alligator head to keep away predators. Floats in your pond. Solar-powered light-up eyes. No batteries required. On/Off switch included. Can be anchored with a weight to keep it in one area.
Change green water to clear by adding a properly sized ultraviolet sterilizer to your pond or water garden. UV sterilization is the only way to guarantee clear water in your pond 100% of the time.