HTH 67010 Stabilizer， 4 lb<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Hth stabilizer， 4 lbs</li><li>It slows the loss of chlorine caused by sunlight</li><li>Extends chlorine life Sun defense for pool water. Compatible with Salt Systems</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41NyLrBlExL.jpg" noproxy>