Sounds attractive to me.
However, as the features of a unit increase, so does the cost.
Do I need a wiper or quartz sleeve?
Should I use more wattage that I need?
Are there features or brand names that I should look for or avoid?

Doug
..


"Mike" wrote in message
om...
I recently installed a 40 watt UV light on my 4000 gallon pond that was
pretty green. You could see down maybe a foot. Each day after installing
you
could see down another 6". After a week the pond is crystal clear down to
the 5' bottom. I never really knew if these things would work or not, but
now I am a believer.