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Read the instructions that come with Nature2. If water not cloudy, they claim you can just use MPS (Activate) BEFORE eah use, plus an MPS shock. If I were your dealer, I would advize you to use chlorine at least for your once a week treatment.
My dealer said that I didn't need to add anything other than the Activate. 2 oz after each use and 4 oz shock once a week. That and the ozonator and chem stick would be all I needed. Am I missing something?
By the way, the Spa Fairy thing is really scary. Term, is that your alter-ego?