•For medium or large aquariums
•It is water proof
•Super For continue cleaning water-UV sterilization
•Algae removal + deodorant
•If you set an additional timer, you can set a timer (3 / 6 / 12 / 24 hours for UV operation) when you need it.
•UV light barrier to prevent UV light radiation to hurt fish
•8000 hour lifespan for UV rays
•The best working time for the normal tank is 2-3 hours per day (please work with more hours to solve heavy green dirty water tank)