I have the HTH kit (waiting on Ben's to arrive) and when I do the CH test, it does not turn red to begin with. Maybe a slightly beigy hue, but certainly not even close to red. So do I try to get that to turn blue anyway, or does that mean there is no CH? We do have soft water, everyone who comes over complains that the feel like they don't get the soap off of their skin when washing.

If it is zero, is that really okay for a vinyl liner? I know this has been discussed in depth, but should I get it over 100 just to have SOME CH in there?

Thanks - this place is a great resource!