Ok well i'm not 100% sure it was the nutes.... BUT my pH problems went away as soon as I switched to sterile sunthetics. I use Dutch Master Zone and couldnt be happier.

My pH rarely drifts more than .2 in a day. Usually it doesnt change at all.

I feel you on the vacation thing. I have to turn on an A/C when my light kicks on and since it's a digital A/C so a normal timer doesn't work and I cant put it on it's own timer for more than 1 day at a time. Big pain.

And as to organics, I'm using my full line up on some plants in smart pots with coco. I want to see the difference in taste, yield, growth etc. I'm running 4 cotton candy Kush and 4 lemon kush with 2 of each in DWC with synthetics and 2 of each in coco running the organics.

I think my pH problem was due to Humboldt roots. It looks and smells exactly like H&G Roots Excellerator which clearly states on the bottle to NOT use in an aerated hydroponic system and only drain to waste. I mean even the bottles look exactly alike just with different labels. When i refer to my pH problem it was raising 1.5 points a day!!! I was dumping pH down capfuls at a time. I went through a whole bottle of Earth Juice pH down in less than a month. And my rez aren't big at all...