I want one of these SO BAD! EcoSphere - inside these sealed glass balls live shrimp, algae, and bacteria, all swimming around in filtered seawater. Put it somewhere with some light and they will self-sustain for years, no feeding or cleaning necessary.
Aqua Farm - Self-cleaning fish tank that grows food. Fish waste feeds the plants. Plants clean the water. Includes everything you need to get started as well as organic seeds, I love this idea you can use your fish to grow plants!
Susan Shelley / Noux is raising funds for Avo: the self-cleaning tropical fish tank on Kickstarter! Avo is a unique self-cleaning fish tank. It requires no filter cleaning or water changes making fish keeping simple and beautiful.
For the fish that likes to live on the edge. From psalt design comes the bubble fish tank. A quick look through their website shows that this is just the tip of the iceberg though, psalt if full of great design. Bubble Fish tank by psalt design