Efficient Feeding: Size: Round one: 2.25" ID x 2.95" OD; Square one: 3.8" L x 3.8" W. The fish feeding rings provide 2 concentrated feeding zones. No worries about scattered food! Effectively avoid waste and prevent fish from fighting over it Easier Tank Maintenance: No more messy fish tanks! The aquarium feeding ring keeps food within its range in case it?s sucked into filters. And it will be a cinch to remove leftovers. Greatly save you time on cleaning the aquatic habitat Quick to Install: Instantly fix the fish feeder ring to your tank with the attached suction cup. No need for any extra tool! The connecting rod allows the ring to float flexibly with the water level. Work great on most aquariums or fish tanks Reliable Material: Made of safe plastic, the feeding ring never emits any odor or harmful substance. Always keep the aquarium clean and livable to aquatic lives. Sturdy and long-lasting, it stands up to extended use on water Only for Floating Food: Enjoy dispensing any type of floating fish food into the ring! (NOTE: Not suitable for sinking food.) Perfect for creating a regular feeding spot for betta, goldfish, guppies, parrotfish, turtles, etc. Product description