Like how much do I use? Example if I want to test accuracy of my DKH tester. Do I add this in to the test kit I am using and should read 6.6? Confused how to use this.
Like the Kh Carer or Alkatronic if I put this in the beaker instead of my tank water and supposed to read 6.6?
Like the Kh Carer or Alkatronic if I put this in the beaker instead of my tank water and supposed to read 6.6?