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Measurements differ from manual testing....
Hi,
I've recently setup my KH Director here, connected to my Profilux 4.
I seem to be seeing a difference of around .5 KH from my manual measurements with my Red Sea pro test kit....
I have taken the time to calibrate my pumps, and see exactly 100ml when manually dosing each pump.
My KH is at 8.4 according to my manual tests, but I am seeing anything from 7.9 to 8.1 on the KH Director.
I have validated that I am seeing no air bubbles.
What could be causing this difference?
Many thanks,
Paul.
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