Advice first time indoors

Looking for a little advice got a 10x10 room using cloth pots and fox farm happy frog have been using the fox farm dirty dozen had an issue with what I think was too much to fast on fertilizer beginning first week of 12-12 schedule room is lined with milar lights are a bloomspect full spectrum 600w. Trying to keep ph between 6 and 6.6 a little different every time to try to let get different nutrients

Shouldn’t be a problem your soil won’t stay the same as your water though because any food your plants don’t eat will build up in the soil which changes your ph and why fox says to flush every once and awhile. Lookin good so far though

Thanks you