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, 20 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 1/2″ inlet and outlet with 3/4″, 1″ ,and 1 1/2″ stepper barb 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. Great for aquarium use as well at the lower flow rates. Read More
