The owners manul for our new hot tub clearly states in several places "DON'T use household/liquid bleach", and DO use a granular form of sanitizer.
As a happy BBB user for my pool, I'd like to use bleach with the hot tub as well.
Is this warning just the manufacturer trying to protect themselves from some sort of liability, or is there a valid reason?
If I'm correct, if I always use granular chlorine, which is stabilized, the CYA level will continue to rise. I guess it's not too much of an issue since you drain/refill every 4 months anyways?