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
·· 1 inlet & outlet
his 40 watt unit is for large ponds up to 6000 gallons using pumps up to 3000gph. It will clear green water in 6000 gallon ponds with a pump range of 1800gph to 2400gph. It will kill many bacteria in 2000 gallon ponds with a pump range of 900gph to 1200gph.