I've used Jungle Juice for over a year and a half, with both hydro and soilless. Currently, I'm still using JJ. Week 1 of flip I keep everything generally the same ratio, then week two I bring the grow back to half a ML per liter instead of 1ml / L. Generally I'm at 1ml of all 3 (Micro/Grow/Bloom) per Liter of water, at my max out veg ppm. Week 2 of flower, I go 1ml Micro / .5ml Grow / 1.5ml bloom. Week 3 flower, I do 1ml Micro / .5ml Grow / 2ml Bloom Then by week 4 I'm at max out PPM of 1ml Micro / 0ml Grow / 2ml Micro and then I start all my supplemental boosters on week 4-6 (I use Bloombastic)
Also, I start adding .5ml per 1L of Liquid Koolbloom, after the transition week in flower. At week 4 I start bringing that up to 1ml per 1L during week 4-6.
(There's roughly 4 Liters to a gallon, just to give you an idea. I'm not Hydro anymore, so I fill up individual bottles.)
As for that PH perfect line.. very interesting. Wonder how it works.