At Campus Drie Eiken two research groups of UAntwerpen, Sphere and Ecobe constructed a large mesocosm facility. A mesocosm is a controllable semi-natural system in which environmental and biological processes can be studied on an ecologically relevant scale of complexity and timeframe. The installation consists of a 1000 m² greenhouse housing 16 large ponds, four 5 m long temperature controlled raceways with variable waterflow equipped as respirometers and an aquaculture installation. Besides the ponds all systems are fully temperature controlled and equipped for gas exchange (e.g. CO2). In the near future (2017) a large 25 m long flume allowing simulation of tides in shorelands will be added.