ProGuard 50 lb. 1 in. Tablets 1/2 oz. chlorinating tablet

Perfect for automatic feeders or floaters, slow-dissolving 1 in. Stabilized Chlorinating Tablets can be used twice a week to keep your water clear. Thanks to a built-in stabilizer, these tablets protect your chlorine from sunlight burn-off. Also, quickly kills bacteria and algae keeping your pool clean and clear.|Model 21654BPG|Slow-dissolving with no clouding of water|UV stabilized; reduces loss of chlorine residual due to sunlight|Sized to fit or refill all popular residential and commercial chlorinators and floaters|Reduces the growth of harmful algae and micro-organisms in pools|No gummy binders to clog equipment