Thats what I am looking for, thanks! I think I want to go with that - we get a lot of snow/ice some years (some years almost none! bad for snowmobilers!) Anyways, there is also large debris falling or blowing from all around so I want to keep that out - silt can be vacuumed/filtered out in the spring. I just hate the thought of the swamp on top in the spring and that is the biggest problem I see with solid. I'm gonna look at the Enviro-mesh and the Coverlon(sp?) see whats out there. Thanks a bunch!!