I'm happy to report that my "new" pool is now properly balanced, or at least ALMOST there. I purchased this older home about a month ago and had CH and CYA levels off the charts. Due to the drought here in Southern Cali, I wasn't allowed to drain or refill my pool. I suppose i could've done it gradually, but it might've taken me over a year.
These are my BEFORE numbers
and now... after RO treatment ($500 later)
The water is now sparkling clear and I couldn't be happier.
So.. should I adjust the CH level as poolmath says its 100 below the minimum goal? The RO guy told me to leave it alone as my tap water is high in CH.