http://waternetonline.com/forums/10/ShowForum.aspxPut on your lab coat and post your <b>water chemistry </b>inquiries.enCommunityServer 2.1 (Build: 60809.935)http://waternetonline.com/forums/thread/1702.aspxMon, 07 Apr 2008 19:45:31 GMT5fee63ad-c11c-481c-97a6-b5b31f1af117:1702Steve Keifer0http://waternetonline.com/forums/thread/1702.aspxhttp://waternetonline.com/forums/commentrss.aspx?SectionID=10&PostID=1702You might try a sequestering agent.&nbsp; Some of the polyquat sequesterants might remove some of the stain.http://waternetonline.com/forums/thread/1701.aspxSat, 22 Mar 2008 23:02:20 GMT5fee63ad-c11c-481c-97a6-b5b31f1af117:1701djmaute0http://waternetonline.com/forums/thread/1701.aspxhttp://waternetonline.com/forums/commentrss.aspx?SectionID=10&PostID=1701We have a new pool with a chlorine generator and the company that closed the pool last year (we live in the northeast) used a copper containing algecide.A few days after&nbsp;the pool was reopened a yellow-brown stain appeared on the fiberglass steps and all the plastic water jets. The chlorine generator manufacture said it was copper stains from the algecide. My questions are: how can we remove the stains and is there anyway of stopping them from coming back, short of completely emptying the pool?