AQUANEAT Filter Media Mesh Bags Plastic Zipper Reusable for Aquarium Fish Tank koi Pond (16"x13" (6pcs))

It worked and prevented the water pump from clogging up. You still have to clean the finer gunk that builds up over time but it is blocking most of the stuff. I ended up wrapping the bag around the pump instead of putting it inside the bag- this way you don’t have to cut holes for tube and wire.