johnstaci :

I agree with the others above . I don't think the pines will cause a pond problem. The most you may need to do is add a little lime to the pond . I stress MAY depending on your current soil . If you have alkaline soil you may not need lime even with the pines.

On a different point you may want to add some other kinds of trees to the mix for wildlife purposes. Pine forests can be a hard place for many types of wildlife. ewest