Well, after putting in some of the plant garland the food would seem to pool behind some of it and be hard to reach for the bubbles. So, I made a a feeder ring from a fast food, clear, plastic lid. It is the large size, like from 7 Eleven or whatever. I simply used an exacto knife, cut out the center, flipped it upside down so it would keep buoyancy like a boat and keep any edges kind of up in the air and away from their mouths, and tada! It stays in the corner because of the circulation of the water, keeps all the top feeder foods from getting gunked up where the fish cannot eat it and you cannot see it unless you bend down and look because it kind of blends in with the water or hides behind the black rim...best part, no cost Hope someone can use it!