Keep The Aquarium Clean: The Fish Feeder Rings Keep The Food In A Certain Area, It Prevents The Food From Floating In Unwanted Places Such As The Filter, Allowing More Of It To Be Eaten. It Is Easier To Clean Up Residual Feed, Reduce Waste And Maintain Water Quality, Increasing More Feeding Fun. Prevent Fish From Being Bulls: Bulls Cannot Shoot All The Rings, So Everyone Has A Chance To Eat In Peace. Fill A Square Feeder And Let Your Most Aggressive Fish Sink To Eat. Once They Are Busy, Add Floating Fish Food In A Second Feeding Square For The More Timid Fish. Reasonable Design: Suction Cup Suspension, Rotating Device, Floating Design, When The Level Of Water Rises Or Falls, Rotating Rod Repositions With Water Level, Floating Rubber Is Built Into The Bottom, The Fish Feeder Ring Always Keeps Floating Above The Water. Safe And Durable Material Quality: The Molain Fish Feeder Ring Is Made Of High Quality Pvc, Which Is Non-Polluting And Protects Fish Health. Floating Rings Can Help Fish Develop A Habit Of Eating In A Fixed Position. Wide Application: The Size Of The Square Feeding Ring Is 10 X 10 Cm And The Round One Is 7.5 X 7, 5Cm, Suitable For Various Aquariums And Fish Tanks. It Is Also Suitable For Fish, Turtles, Goldfish, Cichlids, Guppies, Catfish, Betta, Aquatic Animals, Etc.