Flatlander - You have some sort of algae bloom which you already surmised. No one will be able to tell you what species it is unless they look at it with magnification. Send me some and I will identify it. Go out and scoop some up in a small plastic jar 1 oz to 3 oz. Put about 0.5 to 1 teaspoon of Betadine or idodine skin cleanser in it to pickle it and stop decay action. Send it to me and I will ID it. Get my address from an email to me.


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management