HTH 67066 Ultimate Algae Guard， 1 quart<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Hth ultimate algae guard， 1 quart is a long-lasting， non-foaming algaecide product that prevents and kills green and yellow algae</li><li>With one treatment， this product will prevent algae growth in your swimming pool for up to three months</li><li>6-IN-1. Treats up to 90 days. Kills &amp; controls green， yellow， &amp; other algae</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41pAC0-OJXL.jpg" noproxy>