I just had to rescue my peppermint shrimp from overflow, my overflow is tight. That was a pita. I ended up pulling the emergency drain and letting it drop into the sump, then I chased that tiny guy all over the cramped sump. I couldn't get him in the skimmer section, so I chased into the return. That's where I finally got him... Hopefully being chased around by a ginormous hand will keep the overflow fresh in his mind