How do they look? are they looking more robust, the same, or stressed? If the pre-experiment was a 5 on the 1-10 scale where would you rate them now? Any drier spots returning?
Ideally you want a 4.5 down low, but some O2 is already creeping in at 6-7. I consider 7 wet myself, but if you ease into it your plants should adjust better than tearing the bandaid off. The water stick will tell you when to water.
This guy is a soup grower. He uses organic componds in hydroponic applications, so for starters you can't compare my style to his but....
Arsenic doesn't make the list. Not even as a trace element. If he finds arsenic in his liquid kelp he needs to address the manufacturing process.
He also...
Well the deed is done. RV1 is culled. Tomorrow Numbers 1 and 3 go into the flower tent.
Number 1. I'm contemplating topping them all at the blue lines. She's going to the flower tent.
Number 2. I will keep her in the veg tent for clones. She may get topped a few nodes below the blue line...