In The Swim Swimming Pool Algaecide - 1 Quart<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>1 quart bottle</li><li>Kills and prevents green and mustard algae and will not cloud water</li><li>Fast-acting， non-foaming algaecide is safe enough to swim immediately after application</li><li>Recommended for use in well water as staining will not occur</li><li>Initial Dosage: 26 ounces per 10，000 gallons， Maintenance Dosage: 16 ounces per 10，000 gallons every other week</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41CdEQvyeYL.jpg" noproxy>