@Mañ'O'Green
I understand that coco is a form of hydroponics. I grow my plants in half coco / half soil because of the benefits the coco give for both water retention and soil drainage. But, for the sake of conversation, yes, I understand that coco is inert. I also understand hydroponics quite well, I currently have a backyard full of tomatoes, peppers and cucumbers growing in 55 gallon drums and 27 gallon totes using masterblend.
I understand what they are trying to do with increasing or decreasing the amount of specific nutrients available to the plant.
But this reminds me of that episode of The Office, where Dwight is picking out their health insurance plan. He claims he can raise and lower his cholesterol at will. Pam asks him why he would raise it, and he says "so that I can lower it."
Why would you remove nutrients? I understand ramping up the nutrient amount. But then, if you follow that schedule, you later reduce the amount of certain nutrients. If the plant can tolerate that nutrient level, its not causing burning or anything, why would you take away some of the nutrients you were providing? The plant can choose not to use them.