It is in a protected cove and was used behind a blocking net. Area about 2000 sq feet and water is from 0 to 5 feet. Tin is about 6 ft sq with edges bent up about 3 inches. No ring needed but would be a good idea if subject to wind influence. Feeder throws on top of tin. I have used sinking pellets there as well (winter). Floating used most as there are small BG being fed also. Have even mixed both types of pellets in the feeder during fall (decreasing water temps).