SpaGuard Brominating Tablets (4.5 lbs) SpaGuard Spa Brominating Tablets 4.5# (New size!) Provides Spa Owners with an Organic Brominating Compound in a Time-Release Tablet form to Provide Continuous Spa Sanitation Brominating Tablets are designed for use with Brominators and SpaGuard's Floating Dispenser Dissolve slowly and protects continuously SpaGuard's Brominating Tablets are acidic and will lower your spa pH levels. Constant monitoring is necessary for optimal spa health