🌟 Illuminate Your Pond's Potential! Say goodbye to algae blooms and hello to crystal-clear water! Maintain a healthy ecosystem while enjoying your outdoor oasis. Replace annually for hassle-free pond care. Harness the power of ultraviolet light to keep your water pristine. Choose from 4 wattages to fit your pond's unique needs. 1,800 Gallon Capacity 9W Power 11-Month Lifespan The TetraPond Replacement Bulb is a 9-watt UV clarifier bulb designed to effectively control algae blooms in ponds and water gardens. It operates for up to 11 months, ensuring clean and clear water for ponds up to 1,800 gallons. With annual maintenance and multiple wattage options available, it's the perfect solution for maintaining a healthy aquatic environment.