OneMoreRip
Well-Known Member
The actual pH was around 6.4-6.5 the whole time I'm pretty sure. I didn't have my BlueLab soil probe then though.
The runoff gave me an idea of the soil pH, but when I added citric acid it kinda had the opposite effect than I was anticipating, but it makes sense when you think about it.
My main point is I think it can give you an idea, but it can also be misleading, so be careful using runoff to check pH.
This was an organic grow though. Might be more unpredictable with chemicals. I don't know.
yeah, that would have been my guess. The soil influences the ph of run off more so than the in put water. From everything I have seen anyways