Interesting K, Ca, Mg ratio. I tend to push Mg a little to. In the UK we don't rest on the ratio's anyway. The goal is to supply enough of each.
I presume it's the 4-18-38, which I have not seen used very often. Your weights are very precise.
Lookin good bro. I'll be watching this one.
Hahaha. Here are the updates:
Thanks swapmeet for teaching me. Nute solution is 300 ppm at 5.8 pH