I'm doing DWC bubble buckets, with huge air pumps/stones. Lots of bubbles.
I'm using the Advanced Nutrients pH Perfect Sensi Bloom line, plus big bud, sensizyme, overdrive, and koolbloom.
I have not checked my pH at all since I started using pH Perfect, and I have yet to see a stunt in growth, nute burn, nute lockout, or any bad indication. I have burned them a tiny bit because I put in way to much concentrate (of my nutrient mix), and I already had to much water in, so I just said fuck it and left it. But even then, only the serrations of each leaf have been burned, and thats about it.
And I'm using a 1000 watt light per a 4x4 grow space, although I have some scraggly Blue Dreams under a 200 watt florescant, that are powdery, but not massive. But I should have a 600 watt HPS coming in wednesday to switch out with the T5, hopefully that boosts the scragglers.