OregonRider

I forgot to mention that. The spa has an oxonator and we use silver ion cartridges (which we change every 3 months). We use the spa 2-3 times weekly for about 20 minutes per session.

Newbie here. I searched for answers to this question but wasn't successful in finding an answer. I purchased a (new) HotSpring Vanguard spa 10 years ago. Until recently it never occurred to me that there might be a better way to maintain the water. Here's our current routine: each time my wife and I use the spa we put in two scoops of MPS Chlorine-Free Oxidizer (http://tinyurl.com/lvunvbn). Once a week we put in some unscientifically measured amount of HTH Spa Shock (http://tinyurl.com/k4ms4yr). Once a week we use an HTH test kit (http://tinyurl.com/lsmsy8u) and adjust for pH by using HTH pH Decreaser (http://tinyurl.com/kclkgsl) and Increaser. First question: Since I'm not a "chlorine" user, am I a Bromide user? The only other chemical I've heard of is Baqua Spa something-or-the-other. Next question: What test kit should I be using and are there different chemicals that I should be using? Thanks!