I work with a lot of hot tubs that use the Nature 2 system. In these tubs we add OxyShock once a week and adjust the chemistry. I'm a bit fuzzy on how it all works. What does the OxyShock do? What does the Nature 2 do?
I have found that I often have to supplement with granular chlorine in some tubs to keep them from getting funky, even with the Nature 2. Is this typical?
I have also noticed that adding OxyShock will lower the pH. Is it reasonable to rely on this to lower pH in a tub?
When testing the chemistry of a Nature 2 tub, what should I expect to see? For example, will I see a change in the results if I add OxyShock? Should I ever see Chlorine readings if I haven't added chlorine or bromine?
I have one tub that is a total mystery to me. It has a Nature 2, and it is serviced weekly. I add OxyShock, adjust pH, and typically that is all it needs. For some reason, I get a reading for Chlorine. Over the past few weeks I have seen the Chlorine levels continue to climb to rather high levels (10ppm). What could be causing this?