Please forgive me for saying this again, but... WOW! The pool water is crystal clear. The UV254 Sanitizer works like a charm! I’ve cut my chemical costs in half. My chlorine usage is significantly lower which in turn makes it easier (and cheaper!) for me to balance my pool’s pH. Congratulations on a very useful piece of pool equipment - one that you don't realize you need until you calculate how much money and time you spend buying pool chemicals.