I have been experimenting a bit on trying to make the KH Director spot on. I would prefer to hear the success people have, not a thread to discuss issues or anything like that. What I would love to know is how did you setup your KH director to be as accurate as possible.

Test water: 38ml/m (measured to 38ml/m)
Reagent: 4.5ml/m (mesured 3.5ml/m) @ approx 70cm hard tube)
Wate water: 38ml/m
Adjusted display: 0%

Test water line 90,5cm @ 12ml tube volume.

The one thing im testing is to default the reagent speed 1ml/m over the measured value. @ 3.5ml/m I get a KH around 6.5, but when raised its spot on an average referance KH @ 8.3 (reference 8-9).

So what do you guys run, what what is the results your experience.

I felt it worked better on the GHL Doser 2.1 Revision B - Revision A did pump water slower, so not sure if the revision A is fully compatible with KH Director?