The NoClean Betta Tank
Another "Why Didn't I Think of That?" Moment
The idea is elegantly simple. The NoClean Betta Tank has a built-in siphon and spout that draws water from the bottom of the tank whenever you add fresh water. The siphon automatically breaks when the water level reaches the level of the spout. All the Betta enthusiast has to do is simply add clean freshwater to the aquarium and the dirty bottom water will siphon out — not exactly "self-cleaning" but close enough!
Now if we could only make large reef tanks this easy to service ...