From their website--Spend less time on pool work and more time on pool play! ARM & HAMMER® Clear Balance™ Pool Maintenance Tablets maintain your pool’s alkalinity and pH levels so your chlorine works most effectively. Convenient tablet form means no measuring and no mess – and eliminates the need for other costly, corrective chemicals. ARM & HAMMER® Clear Balance™ Pool Maintenance Tablets are the easy way to keep your swimming pool water crystal clear and balanced all season long while resulting in pool water that is gentle to your skin and eyes.Click the title and head over to their website to download the Arm + Hammer Pool Owners Guide. Swimmingly!