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 20 watt unit is for large ponds up to 3000 gallons using pumps up to 1800gph. It will clear green water in 3000 gallon ponds with a pump range of 900gph to 1800gph. It will kill many bacteria in 1000 gallon ponds with a pump range of 500gph to 700gph.