3 Season history, and a question...

[steveinaz]

See my sig for pool details/testing tools.

Season 1 at opening, new pool (2007):
FC: *(Maintained at 8ppm)
PH: *(Maintained at 7.6)
CA: 225ppm
CYA: 50ppm
TA: 240ppm
Salinity: 2400ppm

Season 2 (2008):
FC: *(see above)
PH: *
CA: 425ppm
CYA: 65ppm
TA: 190ppm
Salinity: 2800ppm

Season 3 (2009, testing done 2/25/09):
FC: *
PH: *
CA: 525ppm
CYA: 62ppm (after adding 2lbs of HTH stabilizer)
TA: 90ppm
Salinity: 2600ppm

As you can see above, the pool is finally "settling down" and TA is finally dropping. I typically have to put about 3 cups of Muriatic acid every Saturday to maintain 7.6 ph; though recently, ph is holding much better. My SWCG calls for a salt range of 2250-2750ppm. I only test CA, CYA, TA, and Salinity levels once a year, at the beginning of the season (or if I adjust something).

My question: Should I be concerned with the Calcium Hardness level of 525ppm with a plaster pool? It doesn't appear to be having any effects on the pool as far as I can tell.