Hi All,
I own a brand new Calspas hot tub which I am very proud of. I have never owned a hot tub before in my life so of course I want to keep it pristine as long as I can. One thing I do religiously is testing the water chemistry every single morning after I wake up. My local spa vendor told me to test once every week if its not being used or every few days if the tub is being used by people. However, I like to do it daily.
Newbie question here: I know I have to maintain a chlorine level of 1 - 3 ppm at all times. However, for whatever reason every morning I come in with my test strip, there's almost no free chlorine left in the water, even when I haven't used the tub in a week for example. Is this normal? Why does the free chlorine disappear out of the water so quickly even when the hot tub is not being used? It confuses me even more because my spa vendor told me that if nobody uses the tub I can test and adjust the water chemistry once a week, but it seems I need to add chlorine literally every single day. pH, alkalinity and hardness are all in the OK zones and stable. I rarely have to adjust these levels. I just need to add chlorine daily. The hot tub is sitting indoors in an enclosed gazebo and also has a cover over top.
Thanks for the insights in advance.