My youngest son and I put the homemade trash rack 55 gallon drum with the 7/8” holes over the UD Slide gate drain at the bottom of the pond. It was super cold at 10-11’ in the multiple spring fed pond. At some point this summer I will have to go back down and “stitch” it together with zip ties where I used the jigsaw to cut the top, one side with the 10” hole to go around the drain pipe itself and bottom together to snug it tight. The trick was to loop a piece of rope through 2 holes in the bottom of the drum tied to an old brake rotor outside the drum. After I had the trash rack in place, I went back down with a knife and cut the rope bringing the piece of rope and rotor out of the pond. I also had looped a length of rope through 2 holes in the top of the barrel that I used to position the pvc barrel and pulled through when we were finished with the job.
Heppy