This is a fully submersible unit that controls water-born algae and prevents the spread of disease.
� Glowing monitor halo ring visible from any angle immediately shows that it's working

� Comes complete with 9000 hour, 10 watt lamp, the longest lamp life available

� Also includes water tight quartz sleeve

� Comes with transformer and 18' grounded power cord

� 1 year limited warranty

� 3/4 inlet & outlet
This 10 watt unit is for medium to large ponds up to 1500 gallons using pumps up to 700gph. It will clear green water in 1500 gallon ponds with a pump range of 500gph to 700gph. It will kill many bacteria in 500 gallon ponds with a pump range of 190gph to 250gph.