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KELLY Please HELP


Last Year it was Water Lettuces and this year it has been a Battle with Pond Scum (filamentous algae). Each year it seems to be a different battle. I have treated/sprayed with Copper sulfate soluble powder. but I am scared to over apply and kill my Grass Crap.

So far I done 4 pounds of Copper sulfate in a 1/4 acre pond approx 4 feet deep. I know I have already over applied with out any real long lasting control. We have had heavy rains and right after I treat the Pond clears up. But then a week later I start seeing pond scum starting to float again. I have a 50 gallon skid sprayer that I only use for aquatic treatments. Therefore equipment shouldn't be a problem.

PS I have a fountain for aeration.
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