In my smaller ponds with 4 inch drains I built a PVC boom arond the drain. Three pieces of PVC with two elbows to make a 'u' shaped boom that is capped on the ends to keep water out and allow it to float. The closed end of the boom faces out into the pond and the two legs are anchored on the bank. Any floating debris stops at the boom. Simple but effective for me and it even keeps out floating algae.

But my overflow pipes are horizontal.

Last edited by Cecil Baird1; 04/05/08 08:07 PM.
If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.