I went to the pool store for a test since I don't have a salt test at home and it rained A LOT this year. Here are the results followed by results from testing at home today:

37-40,000 gallon in-ground plaster pool
swg for chlorine
solar heat
gas heat (not using until I have to...)
Turbo solar liquid cover (it does work, not as good as a plastic cover, but better than nothing)
current temp--rising, but 71 degrees today.

pool store measuremnts 4/19:
FC 2.5
TAC 2.5
pH 8.0
Alk 80
Cal 650
Cya 45
TDS 2500
Phosphates 2500
Salinity 4.5 (2390-2610) ppm--I'm going to have to adjust this

PS233 measurements 4/20:
FC 2
CC 0
TC 2
pH 7.4 (I adjusted to this with muriatic acid today)
Alk 90
Cal 520
Cya 55

Got it? Looks as though I DO have some salt to add to the pool! My Zodiac Clearwater chart says 500 pounds. UGH! I didn't get that the salinity reading was an absolute number and has to be converted to ppm. I also might have to add some stabilizer. My Clearwater manual says that the stabilizer is in range but that in sunnier climates I should have closer to 100. Is that true? Should I add cya? What a great position to be in for me...my cya was always very high at 160 but the rain seems to have diluted things a bit.