Welcome to our forum.
CapMorganI saw your post on another forum regarding this matter. The person who replied recommended against what every tub manufacturer instructs to do...that is to use dichlor form of chlorine. As a matter of fact, his instruction to use bleach is in opposition to just about every manufacturer and my void warranties. Now I am a believer in using bleach or liquid chlorine...I use it in my pool...but in the small volume of a spa it does not make sense. The pH is just too high and the problem with handling bleach is a problem...one slip and you could have irrepairable damage. The fear of high CYA has been well documented here and on other forums...I myself check levels periodically, but the fact that you change water on a regular basis really negates any of the problems presented. Although he discredits Vermonter's method, Vermonter's credentials are substantial and his opinions are backed with solid experience and testing. I have watched Vermonters posts intently for years now and have the highest regard for him.I post this here because I was concerned about the advise and just wanted to present my two cents without having to battle. You can take it for what its worth.tony