Resun Algae-Gone UV Clarifier-UV07/9W

An effective helper for the elimination of dangerous microorganisms (e.g. viruses, bacteria, fungi, but also yeast and algae).
Ultraviolet radiation does not affect the chemical composition of the water, does not change the pH value and does not create a completely sterile environment in the water, so the fish will keep their immune system.
The effect of UV sterilizers is generally higher the more powerful the UV source, the larger the area it affects its surroundings and the longer and more intensively its radiation can affect the flowing water.