Get the most out of your pool and your budget with 3 in. Chlorinating Tablets Plus. Our multifunctional tablets not only kill bacteria and control algae, but also soften your water and protect your pool equipment from scale formation. Specially formulated with a built-in stabilizer to protect your chlorine from sunlight burn-off. Applied twice a week in your floater or skimmer, these tablets can be used with all pool surfaces.