Bromine Tablets (approx. 1" diameter) provide excellent sanitizing for spas and hot tubs, without nearly the odor of chlorine.
 
These maximum potency bromine tablets are slow-dissolving for optimal use in warmer water, so they are more economical to use. Very effective against algae and bacteria.
 
Product notes: Bromochloro-5, 5-dimethylhydantoin 98%.