Once you get your test kit let us know and we will go from there.
I've been using a Taylor test kit for years. The heater guy gave me circular watergram device and recommended a phone app called Orenda.
They agree that my current LSI value is 0.20. which is in the acceptable range, I'm told.
He also suggested that I use muriatic acid, chlorinating liquid and 3" chlorinating tablets in a floating dispenser.
I had been using dichlor and clorox some PH stuff in a bag.
He says check the chlorine after every swim, and test the water once a week.
I test things in this order:
Alkalinity
Calcium Hardness
PH
Chlorine
Cyanuric Acid
To achieve these levels:
Alkalinity - 80 - 120 ppm
Calcium Hardness - 180 -250 ppm
PH - 7.2 - 7.8
Chlorine - 0.5 ppm
Cyanuric Acid - 30 - 50 ppm
Temperature is kept at 85°
The Endless Pool contains 2500 gallons of water.