You can always check over in the Chlorine Feeder and Salt Water Generator section for scaling issue with SWGs and high CA. I am not familiar with that, but there are others over there that could address that possible issue.

I remember that this site was established to avoid adding other things to your pool. The more chemicals you add, the more problems you could incur. Don't forget that rain water will enter your pool too (hopefully) and that will not have any calcium in it.

Take Care.

Harry