Fish For Leaves in Your Pond
Fish out leaves in pools and ponds without any trouble
If you have trees growing over your pond, falling leaves and seed pods will make a mess of your crystal clear water. Just use a fish landing net to catch that debris (leave your koi where they are!). The water drains right through the loosely woven netting, and the leaves are ready to dump. — Ray Serverian
You can also try out these 15 solutions for dealing with leaves.