Bromine tablets are extremely slow dissolving, so it could take more tablets to give a stable reading. The next would be … see more. Not getting a bromine reading could be due to a few things. The first would be there not being enough tablets to give a good sanitizer level.

How long does it take for bromine tablets to dissolve?

It can take several weeks for enough bromine tablets to dissolve, to build an effective level of bromides in the spa - so that bromine can be created. Each time you drain the spa, the bromide level drops to zero. The best way to build a bromine bank is to add Sodium Bromide to your spa, each time you drain and refill.

Does bromine dissolve?

Bromine is slightly soluble in water and highly soluble in many organic solvents, including carbon disulfide, carbon tetrachloride, acetic acid, and aliphatic alcohols. Bromine is not thought to persist in the environment.