hey boom, i know your totally doing a legit setup, just an opinion from my lowly newb ass: i dont know what kinda meter you got, but when i gotta $100 manual calibration ph meter, it wan;t very accurate. next grow im gonna get an autocalibration ph meter with a probe. using the dyes works great for me in my soil-like grows. i think the dyes work good at least to back up your digital readings once a week maybe? just a thought because my meter would give different readings when i fed it the 4.0 ph calibration water, im sure you got a good meter though.