This year we again built a new Aquaponics system, this time in our greenhouse at the Biotoop. Aquaponics is a sustainable food production system which combines plant cultivation and fish. It is one of the best ways to produce food in the city, because it doesn't take up much space. The excrements of the fish feed the plants and the plants clean the water of the fish. Nothing gets wasted. In this workshop you learn how to build a miniponics system, a miniature, home-edition of the bigger Aquaponics towers.