Not being a chemist, I may have this all wrong, but here goes:
When someone posts here stating that they have very high levels of CYA or calcium, the recommendation is always to replace some of the water in the pool. Is there nothing that would break down or sequester the CYA or calcium? Or is there actually something that will do this, but you wouldn't want to put it in a pool and swim in it?
Thanks,
Tim.