Thanks. I'm just trying to bide my time until I can get Ben's main kit.

I ran the tests at lunch and the potential limitations of the OTO kit quickly showed themselves.

But at this point it's better than nothing. I'm pretty certain I don't have CC, as I've been holding a residual tested with FC test sticks that matches the results of the OTO. They could all be fubar, but the pool is squeaky clean (vinyl liner) and crystal clear