Mine read 2000
I have a 27000 Gallon
Vinyl Lined Pool
With a sand filter.
Pool Store guy said to keep an eye on it.
Also my reading for Calcium Hardness was 70 he wanted to sell me something to increase it. Is that needed.
My readings via the Leslie Pool Guy was:
Chlorine no comment I am shocking today but it was 0
TA 70 but I added some arm n hammer today
Calciukm Hardness 70