In preparing for the Octo I ordered at the LFS. (Assuming it's the tank raised bimac I see online) Can they fit thru the screens on bulkheads (1" bulkhead kits)? If they can, how likely will it try in a 40 gal tank with lots-o-hidding spots? If they can, and are likely to try, what can I put over the screen to prevent the escape? additional question, Can this new sump design be improved to prevent escape? Tank has 2 screened drains that will go to a refugium. Refugium will have 2 screened drains that go to sump. I'm Planning to also screen the pumps somehow. The refugium and tank will have full covers.