I'm hydro, just so you know.
I bought 2.2lbs of KoolBloom powder a few years ago. I used less than 2 scoops across a few different grows and won't use it again. It makes my ash hotter and harsher and really, I used very little.
Should your nutrition be off, it might help without harming quality, I run a modified Lucas mix and the koolbloom just throws it off. I'm all about quality.