1 x BOYU UV-6W Aquarium UV Sterilizer

• Quite simply there is NO better UV in its class, the "Compact Aquarium or Pond UV Sterilizer" (yes there are better units for more money in a different class such as ).

Also, it is recommended to install the UV sterilizer when the aquarium is cycled.

What is also important to know is lamp/bulb maintenance.
To purchase a UV Sterilizer, including a better model such as the TMC and then to rarely if ever change the lamp will slowly result in a device that does nothing for your aquarium.
With 24/7 use, these lamps will already be at 50% in just 6 months, which is when they should be changed. After a year of continuous use the lamp is mostly useless.

Perhaps a UV sterilizer is right for your aquarium

Below is a video from BRS which does a good job of explaining the aquarium UV sterilizer. As for the Redox Balance, this is an often overlooked aspect of both freshwater and saltwater aquarists. The Redox Balance is basically the oxidation and reduction properties of water (the oxidation side of Redox).
Most experts now agree that the Redox should be +300 to -100 mV for marine or +125 to -200 mV for freshwater for healthy fish immunity, which a UV Sterilizer can help maintain this balance.[1] Reference ()
In fact a tidal wave of new research (mostly outside the aquatic community) is demonstrating just this aspect of UV Sterilization, including the use of .

Proper Aquarium Water Quality: UV Sterilizer Selection Guide

Ultra violet sterilization is an effective tool especially when combined with other tools such as new fish quarantine (or new fish baths) for disease prevention in aquariums, ponds. Also for general water quality control such as Green Ponds or Cloudy Aquariums.
As well the use of UVC Sterilization is useful in home, office, hospital air purification & even UVC/Redox Blood therapy.

Aquarium UV Sterilizers: Control Algae ..

The aquarium UV Sterilizer is a water filtration device that uses an ultraviolet light bulb to kill microscopic organisms that are free floating in the water. Parasites, viruses, algae and bacteria (good and bad) are the type of things that are "killed" after passing through the ultraviolet sterilizing unit. UV sterilizer devices can be used on swimming pools, in liquid factories (think beer) and in the home aquarium using an aquarium UV sterilizer. Some large water purification centers employ some sort of UV sterilization on the outgoing water. These sterilizer units are also sometimes used in outdoor ponds to help control algae growth and they seem to do a decent job. The primary benefits UV sterilization provides, however, are disease reduction and the reduction of nuisance algae. Ultraviolet radiation can be very effective in reducing free-floating algae, bacteria and microbes in general, certain parasites while in the free-swimming stages of development, and other suspended microscopic organisms (Fenner, 2003a). Seahorses are prone to a number of serious bacterial problems such as Vibriosis, and a properly installed and maintained UV sterilizer can be invaluable in reducing the incidence and spread of such infections. When properly used, UV sterilization can reduce microbial levels in the aquarium to the low levels normally found in the wild or below (Fenner, 2003a).