450 Gal Spa - Bromine - MPS after use?

[Guest]

I've had a 450 gallon spa for about a year.  Initially I had a ton of issues getting the water balanced, so I did the sanitization routine with Ahhhh Some and the spa has been working great.  I also switched from the Spa Frog system to a Bromine floater.

Currently my spa seems to be well balanced.  Ph at 7.6 or 7.7 typically.  Alkalinity is 120.  CH 180.  Bromine sits between 3 and 4ish depending on the day and when I test.  I use the ColorQ system for water testing (no test strips here SON!).

When I first open the cover to use the spa there is a sanitizer smell and a slight smell on my skin after use.  The water is perfectly clear and the chemistry seems well balanced. Not sure whether the smell is over sanitizer or something else.  

I've been throwing MPS in the spa after each use - 2-3 tablespoons (1/2 to 3/4 of a dixie cup).  

I use the spa 3 to 4 times a week.

So should I be dosing it after each use?  What's the smell?  

THANKS!!!

[dlleno]

can you describe the "slight smell"  versus "sanitizer smell"?  how old is your water?  you're not over-sanitizing-- in fact  3-4ppm Bromine is at the low end of the recommended 4-6ppm.