Pool Mate 1-2160 Non-Foaming Algae Rid Swimming Pool Algaecide， 1-Quart<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Metallic Algaecide (7.41% Chelated Copper)</li><li>For All Pool Types (Vinyl， Fiberglass， Concrete， Gunite， etc.)</li><li>Non-Foaming</li><li>Prevents and Kills Algae</li><li>Wait a minimum of 10 minutes after use</li><li>Weekly maintenance dose: 1 oz per 5，000 gallons</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41ik7W-64RL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/412%2Begt7e3L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51DCvK0OJAL.jpg" noproxy>