Hi:
I had a new pond put in in August 2006 - currently it is about 80% filled. Prior to this month, the water was muddy. Now the water has a green tint to it. Is this normal??? Is there anything I should do??? It is about 3/4 acre of surface water. When full, will be about 11-12 ft deep at the dam, and 3- 4ft deep at the shallow end. Pond is located in SW Virginia

Thanks for the help in advance.