Feeding Ring for goldfish is fantastic at saving money on excess food, This floating fish feeder ring will hold the fish foods in one place, avoid a messy environment Help to maintain the clean water quality, maintaining high-quality water and reducing filter clogging, fishes dont need to chase food everywhere, improve feeding efficiency Carefully selected materials, Floating design, longer lasting adsorption force suction cup, When the water level rises or falls, otating rod Repositioning with the water level, Fish feeding ring Always keep floating above the water. Not recommend for sinking food. This black fish feeding ring is suitable for feeding floating fish food, including flaky, granular, various shapes, for fish, turtle, gold fish, cichlid, guppies, catfish, betta, aquatic pets such. Package Included: 1Pcs Fish Feeding Ring, The inner diameter of round feeding ring is 2.1in