Dear @jjkratt ,

Thank you for the prompt reply.

We normally use a 4-tank system (hydroponics / fertigation). Our producers grow in soil (ridges) and in pots. The same tank system is used for both production systems. Our one tank has calcium in it, one is acidification tank and two are used for the rest of the elements.

I know that blueberries is an acid-loving crop, but I also use nitrate and ammonium in my programs. Great idea to begin using Eh in your program, because of the redox environment where blueberries is grown. At this stage I am far away from this, but this is also a goal that I would like to achieve.