[ashappard]

the potassium brings up TDS also. cant remember which brings it up faster :
an equal weight of calcium, magnesium, or potassium.

 

[ashappard]

? I only mentioned potassium as a contributor to TDS

That would mean that there would be an increase in K, which I test and control for; so, it cannot be adding to the increase in conductivity.

you're going to need some pretty accurate testing and precise measuring to guarantee you are not increasing some component of TDS as you dose. And accounting for all the different things going on in the tank, how those processes affect conductivity.. Please dont take that as a challenge to lay out a bunch of science and actually attempt to account for it all.