In The Swim Pool Algaecide 60 Plus - 1 Quart<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>1 quart bottle</li><li>Non-metallic， non-foaming， low-odor polymer-based algaecide</li><li>Not affected by pH and recommended for us in well water</li><li>Can be used in conjunction with a shock treatment</li><li>Initial Dosage: 6-11 ounces per 10，000 gallons， Maintenance Dosage: 2-4 ounces per 10，000 gallons</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41No0A%2Bh1HL.jpg" noproxy>