This is my first pool and I went with the Intex SWG right away. I'm confused about the 3-way test strips that came with the SWG. I tested the water yesterday and the "free chlorine" was the only thing in the OK range. As instructed in the SWG guide I had added the correct amount of salt and waited 24 hours with just the filter running to make sure it had dissolved before switching on the SWG. When I set the SWG yesterday to run for 3 hours it did so, and when I checked it in the evening the last code to be displayed had been 93, so all is well.
What I don't get is if the SWG is not telling me the salt is too high or too low, then why are the 3-way test strips not accurate? I'm airing on the side of caution and won't use the pool until I'm sure it's safe. Can someone tell me if I need to have all 3 things on the test strip be in the OK range, or do I just care about the free chlorine levels with the SWG system?