G8 T5 Philips linear fish pond UV lamp from Discount Leisure Products
A UV clarifier will kill single cell algae in ponds that is the cause of green water in ponds. The output of the Philips 8 watt fish pond UV bulb as with all UV lamps will degrade over time a need replacing. Discount Leisure Products recommend replacing your UV lamp once every 6 - 12 months in order to maintain optimum performance of your UV clarifier.