If using Jacks 321 mixing with RO I get an EC of 2.0 no problem.
Now, this is where things get fuzzy.
After mixing in the Jacks and ending up at EC of 2.0
I add 650ml of Terpinator……..my EC moves up to 2.8 +/-
So…. If I add RO to bring the overall EC back down to 2.0
should I add cal/mag to...