I have been visiting this site for 3 years -- learned a lot. I finally bought the test kit. My results are
fc-2.5
cc - 0
ph - 7.2
alk - 70
cal - 190
cya - 25
temp - 83
35,000 gal 20 year old gunite.

I bought a heater 2 years ago and in the documentation it recommends lower calcium because "things" can grow in the heater and it won't be covered. so I try to run the calcium around 200. If I bring up the ph a little will the alk go up or down (I can never remember everything I read at this site).