Your pump will fit well in the smaller protector. The net will stretch some and you need to go down through the two float rings, but you can maneuver a pump if need be. The net is 12" x 24", so you have plenty of length and girth. You should not have a problem if you have a debris filter on the intake. I use Laguna caged pumps in these bags and they are working GREAT! I still add several large pieces of the Matalda filter material (or any course filter material) to surround the cage holes to make sure to keep salamanders and smaller plant material from being sucked into the pump. Before I added the filter media, one time I noticed my water pressure had reduced. I easily corrected this problem by lifting bag by the slip-tie and swished it up and down several times. I'm also keeping the pump above and NOT IN the deepest part of the pond due to muck accumulation. What my exterior pressure filters don't catch, I clean with a fine net and an occasional muck vac.. Buy several protectors as they are wonderful for plants, high quality thick material, prices are reduced and koi like to hide around them as they are a source of shade. NOTE: The 2' diameter protector is designed differently.The drawstring is pulled tight under the top edge of large plant container (up to 24" round/square) and has a top float ring, or pull drawstring tight to close bottom but float ring remains open 24". Height is 2' maximum: Deeper water will result in float ring being below water and still open 24" so fish could still reach plant roots. Place in more shallow water or elevate with blocks to solve this problem.