@420autoflower: Regarding:
"It [pH Perfect base nutes] was always off before anything was ever mixed in, and I tested with R/O and tap water.......I just purchased 2 fresh bottles of Advanced Nutritions PH Perfect A&B and I’ll post test results in a couple weeks."
Rather than mixing and testing pH (irrelevant according to claims), maybe test performance and grow some plants with the stuff? Not adding more salts to adjust pH might work well with rockwool blocks and the 420 Method?
I am not defending/supporting Advanced Nutrients, their monopolistic pricing, marketing, its corporate or leader's behavior, etc. (much of which is questionable), just noting that their stuff works as claimed for likely most users.