Kem-Tek 177 1-Inch Chlorinating Tablets for Pool and Spa， 4-Pound<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>The most convenient effective and easiest form of pool chlorination</li><li>Slow dissolving and concentrated for long lasting sanitation</li><li>Stabilized to reduce chlorine loss to the sun's UV rays</li><li>Maintains strong and steady chlorine residual</li><li>Manufactured to resist crumbling</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41Upo9yXKnL.jpg" noproxy>