About this item Material: This Floating Food Feeder Circle is made of high-quality rubber and plastic, which is pollution-free and protects the health of the fish. The powerful suction cup is firmly sucked on the wall of the fish tank and will not easily fall off and cause the fish food to scatter. Function: Some fish are more finicky than others or maybe a bit more shy and do not want to eat with the other fish. The Floating Fish Feeding Ring allows you to feed specialty foods to the pickier fish while sprinkling standard floating fish food to the general population of fish. Keep the Aquarium Clean: Buoyancy foam is ,embedded at the bottom of aquarium feeding ring to increase buoyancy. The fish food is firmly fixed in the feeding ring, will not be scattered everywhere and moldy, and will not be pulled into the filter to block it, making your aquarium clean and healthy. Floating Food Only: Suitable for feeding flake foods and other floating foods. Put foods into the Floating Food Square, it will prevent food from floating around. (no use for sinking food). Package included: 4 Pack Fish Feeding Ring in total( 2 x Square Shape Ring & 2 x Round Shape Ring).