OK, so really it is my second full test, but I thought the 51 degree H2O might have affected things. Here are my numbers:
FC 1
CC 0
TC .5
pH 7.6
Alk 110
Cal 360
Cya 0
Temp 67

30K gal., IG plaster, 2nd season. SWG.
Since I haven't been able to keep my chlorine up any higher, I'm guessing that the Cya number must be right, but it was at around 35 all last year. Could it go to zero? All the other numbers are consistent with my "real" first test this year and my numbers from last year.

Any suggestions?