Yellowing Vegging in Bat Mix

no that's def not mag issue

You have purple stems and yellow leaves from not having enough nutes to sustain it. You have had low PH (it should be mid 6's) which and compounded the problem of the plant not being able to absorb nutes from the soil. I am not getting into a pissing match so here is my rec do with it as you please. Start to feed both foliar and by watering Start off the watering part slowly so you feel comfortable as to not burn them and foliar feed. What do you plan to use again for nutes?

cheers sparkafire for an on point response.
I hadn't thought of foliar feed, never tried that so will do some research...
I've been using Bio Bizz (Grow), will try a spray of that.
thanks again