fishnutham said:not recommend 24/7 kills the macro nutruients in the water table run it on a timer when the lights go out have it turn on for the night i have three set up this way works good for me.
no it wont
uv are meant to alter or retard the genetic structure of the pathogenic cell and destroys it ( hope i got that right)
uv will have no affect on inorganic salts and minerals that is in the water