Aquarium Ultraviolet (UV) Sterilizer – Why do you buy it ?

Why do you buy it Aquarium Ultraviolet (UV) for your aquarium? Several months ago I bought a 15 watt Aquarium Ultraviolet (UV) Sterilizer for my 110 gallon saltwater aquarium and I was hoping that it would help me in a couple of areas: The Powder Blue Tang (Acanthurus leucosternon) was the  fish that I wanted to keep but after reading about how difficult it could be to care for them I stayed away from them.  It can be very difficult…

"Aquarium Ultraviolet (UV) Sterilizer – Why do you buy it ?"