This piece of equipment makes having nice clear water in your pond so much easier.
UV filters, or UV lights, whichever you prefer to call them, are a necessity for a clean pond. Used in conjunction with a pump and water filter, the UV lights main duty is to destroy the algae in your pond. The dead algae are then collected by the pond water filter and are easily rinsed out of the pond filter media by means of a garden hose. Consequently no green scum floating on top of your pond.
As with most pond accessories there are a multitude of makes and models. Some are submersible and some are not. I like the submersible type because they’re down in the pond out of sight. Some of the different makes are Tetra, Aqua, Elektra, and Zap. They are all rated by pond size.
The one shown in the picture is made by Tetra, and is submersible. In the picture you can see the extensions where the plastic tubing gets attached; one side the intake, the other side the output I just hooked up one of these Tetra filters for a local customer the other day. Very easy!