Not sure I will try and check later. I have never tested run off before. Just reading around. I wonder if I have some kind of bug
I would start by testing the runoff to see where the ec/ppm is at, then go from there.
I would also start cutting the ro water with your tap and bring it down to about 200 ppms at least. It should help you save on from buying anymore cal/mag and extra ro water.
