Maintain Water Quality: The Aquarium Feeding Circles Is Suitable For Feeding Flake Food And Other Floating Food. It Can Also Prevent Food From Floating And Prevent Food From Entering The Filter, Which Can Effectively Maintain Clean Water Quality. Safe Material: The Aquarium Food Ring Is Made Of High Quality Plastic , Durable, Eco-Friendly And Environmentally Friendly. It Is Very Safe For Water Quality And Fish And Can Be Used With Confidence. Intimate Design: Each Aquarium Fish Feeding Ring Is Equipped With A Super Suction Cup, Which Can Fix The Power Ring At Any Position. The Adjustable Sealing Ring Can Float According To Different Water Levels In The Aquarium, Which Is Very Convenient. Upgraded Design: Two Aquarium Feeding Squares With Different Heights Are Suitable For Different Aquariums.It Can Hold More Kinds Of Fish Food And Can Prevent Large Amounts Of Water From Being Inhaled Before Eating. Comes With Package: Including 4 Square Feeding Rings And 4 Round Feeding Rings, Which Can Effectively Reduce The Waste Of Fish Food And Keep The Water Quality Clean. It Is A Must-Have Accessory For Your Aquarium