You're welcome! If you're going to get a proper test kit in the US, get the Taylor K-2006 or K-2006C, or the Leslie's FAS-DPD Chlorine Service Test Kit. But you'll have to get them online and have them sent to a US location. Stores don't sell them that I know of. There's some issue with getting these kits north of the border, but I'm not sure what it is.

The problem with such pool store numbers is a lot of them test with...strips and then plug the results in the computer.