possible phosphorus problem in week 4

I can never emphasize enough how big of a help it is to get those little soil ph test kits from almost anywhere, Walmart, Lowes, etc...getting your runoff water can certianly give a neighborhood number, but to really know the PH of your root zone, those little soil PH testers are great to have at hand. It would make sense that these symptoms got worse when you cut back on feed if the problem is low potassium...idk if it is or not, but if it is, it would make sense as to why it worsened after the nutes were lowered.

CB,

Cool.

NPK seems plenty fine to me.
I'm with you on this one. You fried them a little.

Here's what i could find on gh3-

Grow 2-1-6
Micro 5-0-2
Bloom 0-5-4

Total - 7-6-12 / 2 = 3.5-3-6 or equivalent.
Ratio - roughly 1-1-2.

Decent ratio.
Decent dilution.

Im with you. More water to your roots.
Check a soil sample for ph, incase its low.

Good luck,

Tim.