Clorox Pool&amp;Spa Xtra Blue 3-Inch Long Lasting Chlorinating Tablets， 5-Pound 23005CLX<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Protects against algae and bacteria for water that stays clean， clear and free of visible algae</li><li>Kills all types of pool algae and kills bacteria</li><li>Protected against sunlight to last longer</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51TMRikrXOL.jpg" noproxy>