Also as I have found out it depends on what is in your pond. What plants you
have. How much sun you get. There are all kinds of variables.
"Barry" wrote in message
ink.net...
Have 1200 gallons with a +/-900 gph pump.
What size UV light should I be looking at?
I've been told both 25 and 40w.
Are there brands that are suggested over others?