Ultraviolet sanitation has proven itself as an alternative to harsh chemical treatments to control algae, spores, and bacteria present in the water column. UV clarifiers destroy disease-causing pathogens as water is pumped through the unit. A properly installed and well designed UV sanitizer will lower the incidence of disease and increase longetivity and over all health by improving the aquarium/pond redox balance. See what others have to say about these top Sanitizers. Remember a little light goes a long way. Perhaps an Ultra-violet sanitizer is the right choice for your aquarium. Keep your Saltwater, Freshwater or Reef tanks CLEAN with UV technology.