You can use this link to visit our pond page
and check out the PVC frame and leaf net system.
http://radioheaven.homestead.com/Cement_Pond1.html
It's been up now for 3 years and works fine.
There's an extra section that's rolled up laying
on top that I roll down in the fall to stop more
of the leaves that are flying around.
I leave the net up all year around since we have
lots of large trees that are all the time dropping
junk in the pond.
I just the leaf blower to blow the leaves off the collect
on top.

Happy ponding.

Ron in NC