Wilfrid Laurier University – Fish Holding Tanktony
Wilfrid Laurier University – Fish Holding Tank
The filtration pump takes water from the bottom of the tank, through the TR-20 temperature controller and into the degassing column. This column is made of 16’’ degassing nodules followed by 1 L of crushed coral and of 3 L of ceramic rings (biofilter).
The circulation pump feeds the water through a 3’’ pipe under the tank. This water is returned to the holding tank at a flow of 237 lpm. The action of the current of water together with the sweeping action caused by the movement of the fish carries the feces and uneaten food to the space at the base of the grid. Here they can easily be removed by means of a feces trap. Note that the grid allows the section containing the fish to be divided into two sub-sections – hence it is designated the dividing grid. Cleaning of the feces is carried out by opening the feces trap valve (one valve per feces trap) situated near the bottom of the tank.
Once through the section containing the fish, the water passes through the pad filter and a second grid to end up in the pump section.
The water level and the water make up adjustments are controlled manually by adjusting the valve in the filtration section.