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Actually the Dichlor is required to activate:http://www.nature2.com/spas2.asp
AmySueYour Baqua powders (spa up, spa down, calcium) can certainly be used with your dichlor/N2 system. It is all the same stuff (but not the waterline control, shock, etc).I'm with Warkovision. I don't understand all this activate the N2 cartidge stuff. I think some dealers really like you to use MPS because you need so much of it.