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.