Years ago, I came up with an acrylic bracket to keep food in the display tank instead of letting it float across the surface and into the overflow (thus down into the sump, wasted and uneaten). I called it the Eheim Chimney, as it was made to fit the Eheim Autofeeder system. Turns out it fits the Apex AFS just as nicely. I usually suggest the person simply put it on top of the overflow box since that's a great place where it won't be knocked off into the tank. If the overflow box doesn't have a lid, I can make that as well.