Ok Im using a drip system 18 plants
water twice a day one at 845am the other at 420pm
the roots are not touching the RES water yet but their getting close

so your saying its better to wait untill the lights turn on to chagne the PH
so from 845am to 1200am the RES water is going to have an unblanced PH
isn't that goin to be bad for the roots when they start touching the RES water?

what if I could change the PH with only allowing little (and very light) light?