I recently bought a spa with SWCG. Having trouble with managing pH, and following suggestions on this site, I decided to invest in a Taylor K-2006 test kit.
Here is an unboxing video of the kit.
Here is a link for the Taylor K-2006 test kit from amazon.com.
After recording the video, I did run tests, and successfully managed to bring my TA down from 120 to a target 50, and the pH from 8.1 to 7.5 in a matter of a few minutes. I am glad I purchased the kit and look forward to continue using it.
Any comments welcome.