So I tested the water a couple of days ago and chlorine was at 13. Today it's at 10. We have only been using pucks and there was no reason for the pool to be at 13 the other day with only one puck in our skimmer. It was the 26th when it was at 13, so that's, what, almost 4 days ago and it's only come down 3ppm...
Does this seem strange to anyone? Normally our pool holds around 4-6 with pucks, so this seems really odd to me and my husband says he didn't add any chlorine to the water. We haven't shocked or anything. Thoughts?