Let me preface by saying, I have ordered a test kit and it’s on the way. 
This year we have had a terrible time opening our pool… the longer rainy season really put us in a bad place and for the first time since having the pool, we cannot get it to clear. The pool was very green initially but after a few rounds of shock, it’s blue but cloudy and chlorine added in the evening is gone by morning. Filters are a month or two old and were cleaned last weekend.
The pool is approx 20,000 gallons and dark plaster that was refinished 2021.
Right now I am using Clorox Test Strips and the readings from this morning are after putting in 2 bags of shock about 8pm yesterday:
Hardness: 500 (this has been the hardness forever… even when the pool was inspected at time of sale. We have really hard water)
Total Chlorine: 0
Free Chlorine: 0
PH: 7.2
Total Alkalinity: 120
Stabilizer: 0

This year we have had a terrible time opening our pool… the longer rainy season really put us in a bad place and for the first time since having the pool, we cannot get it to clear. The pool was very green initially but after a few rounds of shock, it’s blue but cloudy and chlorine added in the evening is gone by morning. Filters are a month or two old and were cleaned last weekend.
The pool is approx 20,000 gallons and dark plaster that was refinished 2021.
Right now I am using Clorox Test Strips and the readings from this morning are after putting in 2 bags of shock about 8pm yesterday:
Hardness: 500 (this has been the hardness forever… even when the pool was inspected at time of sale. We have really hard water)
Total Chlorine: 0
Free Chlorine: 0
PH: 7.2
Total Alkalinity: 120
Stabilizer: 0