Haqos UV steriliser helps remove algae from Aquarium or pond, Easy fixing design, this water clean light help to clean the green water. STABILIZE YOUR ECOSYSTEM - Removes the toughest grime in your Saltwater Reef Tank, Freshwater Aquarium, or Pond. Simple to achieve crystal clear water by keeping Nitrate levels down PROTECT YOUR FISH - The High-performance UV bulb ensures professional power to keep your ecosystem clean without additional use of chemicals. Perfect for saltwater corals and invertebrates