I was sold the baqua spa as well when I bought mine, and struggled with it for several years thinking that it was the best stuff on the market because the spa dealer said so. I'd stear far away from this stuff as you need to be a chemist to get it right.
I now use one of the self release (frog stick) that you put inside your filter. Use a tablespoon of chlorine twice a month, and add the stabilizers per the test strips.
My water is as clear as it gets, and no sticky line around the rim like the Baqua spa.
Around here the spa dealers are suffering. Alot have gone out of business. I bought mine from a big chain that was going out of business (NV backyard) They were advertising 20% off and then another 15% off of that and 0% interest for 1 year, so we got a really good deal on it (I think it was right at $5k)
There was a guy on craigslist that wanted to buy a used spa and had $3k to spend. I contacted him to buy mine, and he was very interested and ready to come look at it. My wife cought on to what I was doing and told me that she'd rather keep it, so I still have it and use it maybe 12 times a year.
