Now I'm more confused then when I started. My pond is a valley pond and when I get a lot of rain I get a overload of nutrients washed in from storm drainage. After large rain I get FA blooms. Sounds like they may help filter my water half decent. RES are next to impossible to find in my area but I do have pumpkin seeds and CC. My ponds alil over half acre. I think I'm going to try it I took pictures of them today I will post them tommorow.
