Breakpoint chlorination dosage for indoor pool, please1

[waterbear]

Uh. Wow! You got IDENTICAL results, down to the nearest ppm, 3 days apart? Is this pool in a giant freezer, and you're chipping off samples?

James, the HTH 6-way drops kit does not read to the nearest ppm. What's going on?

The HTH kit also does not read FC, only total chlorine.