Nice pics, I love how the LPxGG looks, like it is powdered with trichomes.
Last run a few months ago I had a similar problem, 4 of my plants were drinking in bloom every 10-12 days...real slow. Lowest harvest yet. It was third run soil, but I believe the balance was way off. This is the same soil I learned how to use the kit on, so I’m sure I messed up along the way, and the Epsoms I was throwing at the OG, didn’t help. I through it in the compost pile.
The current grow I have going is also in third run, but a different batch, and the salt loving plants are doing great (OG & Chem), but the others BG and C99 are limping along. I’ll be mixing some fresh soil this fall as well.
Next time around with 1st run soil, I’m going to resist the urge to use Epsoms for the Salt lovers, and refine my use of the snake oil. Keep the soil balanced.