Artie, I would ditch any form of copper in your situation and talk to Nate about his bacteria line and perhaps GreenClean Pro.Constantly killing off your ring of algae just feeds the symptom. This would also leave you good for any trout stocking in the future if you wanted to.I would also have Nate run some basic water testing if not done already for ortho P PH alkalinity etc just to get an inventory. Also if your feeding your fish be sure all feed is being consumed at it does not take much uneaten feed at the shoreline to start FA growing.Just my 2 cents, Good Luck