As I understand it from this forum, MPS is not really effective in lowering cc once it's there as using Chlorine to reach a break point to effectively reduce the chloramine.
recommended usages then:
Use on a regular basis as a preventor.
Use with indoor spas to reduce chlorine smell.
But how does it work in helping preventing high levels of CC counts...or how does sulfate interact with all the waste that contributes to CC?