A young British designer Suzy Shelley has just launched the only fish tank that never needs cleaning, water changing or a new filter. 15-litre fish tank Avo is packed full of innovative technology, enabling fish, plants and bacteria work together to create a balanced micro-ecosystem. All you will ever need to do is top up the water and feed the fish. It’s so effective in fact, the prototype has been going strong for 18 months without a cleaning and still has healthy fish, plants and clear water! Avo also features automated LED lighting specifically optimised for plant photosynthesis and growth, which promotes clear and healthy water. Avo’s unique lighting has the added aesthetic benefit of producing soft red light in the morning, fading to daylight white, to cool blue in the evening. Suzy has just launched a crowd funding campaign on Kickstarter to raise funds to manufacture Avo. And if you need more beautiful and expensive fish – be sure to check 10 Most Expensive Fish In The World.