NoClean AquariumsTM is the fastest, easiest, mess-free and fun way to have an aquarium! Pour a glass of water into the aquarium and watch it clean itself thanks to its patented GravityFlowTM self-cleaning system! The aquarium is eco-friendly and uses no electricity or filters so there are no running costs. Wastewater is neatly collected in a cup for easy recycling as organic fertilizer for your plants. Now anybody can have a beautiful, fun-to-watch aquarium without the hassle.