I hate to say it but if the stream is an on going source of nutrients this will be problem that won't go away. Dye may help some but it won't have any effect on the FA that forms in less than 3 feet of water. Grass carp don't prefer algae unless there is nothing else but I doubt 12 fish will do much.

A treatment of aluminum sulfate would probably help by binding the phosphorus in the bottom but I would remove as much FA as you can first with a very shallow seine (12 inches).

FA left in the pond to decompose simply feeds the next crop of FA.

Last edited by Cecil Baird1; 04/11/13 03:03 PM.
If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.