I think for now I'm going to forget about the calcium hardness issue, unless I find a product that will help that without screwing anything else up.

The pool is now crystal clear and I've been able to hold FC of 12 overnight for 3 nights running.

New test results:

FC: 12
CC: 13.5
pH: 7.8
TA: 520
CYA: 35

I will now start to lower pH so I can begin aerating to lower TA.

Thanks all for all the help....now if the sun would just stay out enough to warm things up we'd be swimming!!!