Thanks for the responses, yes the visibility was down too 2 inches last summer but we had not done any ferterlizing last year? this year the visibility is a little better and the first fertelizing was done 6-8 weeks ago, 5 10,000 sq. ft. bags over 4.5 acres & none near pond edge. Does nobody with a pond use weed and feed on thier lawn?? I would like to restock, just dont know if I should yet, should I treat the pond with algeacide first? Should my water be tested for something? thanks Mike