well bricktown73, i really started the pump at 24 on cause of the fact true mister heads would need to be on all the time, or so i i've read, and widow87's Q will be answered too, i originally tryed the hole system with the black headed misters, that produce a tru mist.....but those frigin things need Major pressure to use, so i changed to the red ones, hell, my 264 gph pump only made those black ones drip!....i just kept the same 24 on for the pump and it works good as long as the water mix is staight water or vary weak furts, and i mean way weak...
pretty sure the reason to time the pump is to stop over ferting and foarce roots, but if you use a just water mix on 25/7, they will shoot roots looking for food (fertz).....