Note: Additional accessory—two 4 mm round rods (e.g., acrylic rods)

A 3D-printed aquarium waterwheel eco-decor, powered by the outflow from the aquarium pump. The water flow drives the waterwheel to rotate, lifting the aquarium water to a higher level and guiding it through multiple tiers of planted aquascaping pots before returning to the tank, thus creating a complete water circulation system. This device integrates aquatic plant cultivation, water-quality circulation, mechanical transmission, and a shelter for fish and shrimp, enhancing the aesthetic appeal of the aquarium while providing a safe resting space for aquatic life, thereby achieving a harmonious balance of ornamental value, practical functionality, and ecological sustainability.