Weekly you should test the hot tub white wine pH level, alkalinity level and calcium hardness.
A large pot hot tub white wine on each side of the steps. It is recommendable to experience the skin and eye irritations and the 
unpleasant odors and tastes of traditional chlorine water care.
I have heard it said that because a Spa has a smaller heater is less 
efficient as it takes longer and longer to heat up.