About This Item HTH Chlorinating Tabs are a simple convenient way to keep your pool water clean and clear. Simply place tabs into the skimmer basket floater or feeder to sanitize and protect your pool water from algae and bacteria. They are sun protected and designed to dissolve slowly giving your pool a steady source of available chlorine for up to one week. HTH Chlorinating Tabs are great for all pool types including small pools pop up and above ground pools vinyl lined pools as well as salt water systems. Available in 1 inch and 3 inch tabs. How To Use HTH Chlorine Tabs Follow the on pack instructions to place tabs in your swimming pool feeder floater or skimmer. 3 inch Chlorine Tabs work great with the HTH Skimmer Basket Insert. The amount of tabs you use depends on your pool size. Do not add tabs directly to the pool as this can cause damage to pool surfaces. Repeat every week or as often as needed to maintain a chlorine residual of 1 to 4 ppm. 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.