Hi fellows,

I have to process (clean up) some rocks to prepare for another tank deployment. As part of the preparation, I intend to soak them in (boiling) water in a pail for a period of time. I will like to monitor for any GH/KH fluctuations during their period of soaking. Previously I purchased an API GH/KH test kit but I believe that kit has expired even before I use it.

So, I'm looking for another set of GH/KH test kit (recommendation). & as a reference, may I know approximately what the GH/KH of our local tap water is, so that I can:

  1. take a control sample before the rock leaks any effect,
  2. ensure the test kit isn't "wonky" this time round?


Thanks.