Thanks for the reply rbonin.

I have a testkit from Leslie's. It looks identical to the Taylor Troubleshoot Kit, except mine has the ability to test CYA and Calcium Hardness as well. I'm basing my 230 and 217 figures from Paddock Pool's testing though, where they use some test strip under ultra violet light. So those numbers are the before and after at the same place.

However, I will say that I tested myself when the number was 230 and it seemed to end up about the same, but when I retested after replacing water, mine came close to 140 or so...which is a guess because the test tube only goes to 100. Maybe mine is more accurate...? I guess I trust the pool store more than my own newbie numbers.

Let's assume I'm right and the number is 140, the store tells me that 30-200 is the limit...but online everyone says 30-50. Which is correct?

Also, do you think that it's likely that I have pseudmonas in the pool when it's clear as crystal?

Thanks!
PS. Sounds like I don't have to add the sand change weekend project to my list