*Product May Be Subject To Extended Lead Times. The UltraZap 15W Professional UV Sterilizer is a powerful water purification system that effectively neutralizes bacteria, algae spores, and pathogens. Equipped with a high-quality quartz sleeve and an energy-efficient UV lamp, this model is perfect for mid-sized aquariums, koi ponds, and marine applications. It helps maintain a balanced ecosystem by reducing harmful microorganisms and improving overall water quality.