I have had it real bad and continue to have it.

It will come to the surface of the pond and create large floating mats. If it rains that will keep it down.

Floating mats I will pull out.

Stirring up the the silt will knock it back a good ways and constant stirring it up will clear the area. I just go out in the water after working to cool off and just kick up the silt.

Chelated copper will control it pretty well but does get costly.

Let me know if this helps.