Figure 1.

Front view of the zebrafish housing system. The water reservoir is located at the side of the shelf, the pump connects to the water supply line. The supply line supplies water to the 3 upper shelves that contain zebrafish tanks. Every shelf is supplied independently and can be individually controlled (on or off) by means of a valve (V). Water is supplied to individual tanks using water taps (T). The supply line also has a valve at the bottom end for maintenance flushing of the system, and at the upper end it continues into the drainage line. The drainage line receives water from the supply line and from the shelves containing fish tank and ends into the water reservoir tanks.