Well you could do it either way....I don't think that is your issue here but whichever you decide don't change it around or you will really confuse them.

Definitely check ph when you can. As for your nutes.....are you using the pro blend grow? You aren't using the bloom stuff are you? I have that stuff for my hydro....there should be directions on back of bottle. 1/4 strength sounds good...if they do well with it over a week or so perhaps go to 1/2. I don't have my bottle but if they say use it everytime go with that....or however often they say.