I just realized I recently got some Sofchek hardness test strips because I just got my water softener serviced and the meter no longer works so I wanted to figure out how many days I should go before regenerating.

I ran the test strip on my softened water and the pool sample and both came up near 0 gpg (0-25 ppm) in color. I then ran a strip on the incoming water from the well and got a 7 gpg (120 ppm) reading - I know from past water tests that the raw well water was about 8 gpg so this seems about right.

It looks like something else in the pool water is messing with the HTH hardness test.

Peter