diagnostic help

So I'm new to growing and I'm running into some problems and can't decide if I'm watering too much or not enough. Or maybe it's something else. I have read so much about both and have adjusted my watering both ways but still can't decide what it is. My soil ph is just below 7.0, I definitely...

Pigeons 420 doesn't roam these halls any longer, but many of us still follow his beloved ass on YouTube. Admittedly, he's never been good at diagnosing nutrient problems. Watching his weekly garden update this morning my heart was wrenched at the sight of this suffering Afghan Kush...

So I just switched to 12/12 and switched from grow to bloom, well the transition suggested amounts of GH Flora drain to waste chart (half of the chart recommendation as I always have) and for the 1st time I am getting bright yellow in the new growth, and what looks like a calmag deficiency. Help!