About This Item Protect your swimming pool against bacteria algae and other organisms and enjoy clean clear pool water with these convenient one dose tabs. Sun protected for longer chlorine life HTH 3 inch Chlorine Tabs Advanced dissolve slowly and last up to one week. HTH Chlorine Tabs Advanced are great for all pool types including vinyl lined pools and salt water systems. How to Use 3 inch Chlorine Tabs Advanced Simply place one slow dissolving pool chlorinator tab in your skimmer floater or feeder. Do not add tabs directly to the pool as this could damage surfaces. The convenient 1 week dosage treats 10000 gallons. About HTH Pool Care HTH was developed with the pool owner in mind. We know that maintaining your pool water can be a lot of work. That is why we are here every step of the way helping you clear the uncertainty from pool care. With economical easy to use solutions HTH is designed to work hard so you are prepared to tackle whatever life throws in your pool. From balancing your water to treating green water we offer a full line of products to keep your pool water healthy and your swimmers happy.