My pool is a 20,000 gal AG vinyl liner.

last night I tested with my HTH 6 way and got these numbers.

TC 0.5
Ph 7.2
TA 120
TH 500
CYA >100

I took some water in to the pool store for testing today and they got the following numbers.

CYA 100
TC 1.5
FC 0.4
Ph 7.1
TA 86
Adj TA 56
TH 220