I personally do not water to runoff, never really have. They get a gallon of megacrop (I’m in 5 gallon containers) as needed, I go off of the weight of the pot. I do treat seedlings differently of course. They get plain water until day 6 or so….then very light feed in increasing amounts, as needed of course until around day 15 or so….then increase strength from there. Yes, you’ll need to ph and be sure not to over feed them and all that… hope it helps, feel free to tag me with any more questions.