It really is kind of a breeze to own and maintain a tub, or at least for me! I was nervous about the work involved, but I have found that, after over a year of ownership, I test my water about once a week (unless I find a problem, which is rare). I adjust what needs to be adjusted, usually my ta and ph need to be raised a bit, and that is it. Other than the chlorine I add after my soaks!
Wise men around here gave me great advice when I was first starting, relax and take it easy! A little bit goes a long way, and enjoy the tub! Don't stress about it!