Page 58 - fish_farms_curriculum

6.1. Fish Tanks

Fish tanks may differ according to the materials they are produced and their shapes. Different

types of tanks can be used for different purposes and sizes, as well as for fish of different sizes
and life stages.

Plastic drums and IBC tanks can be used as fish tanks in amateur geothermal systems. It is

important that the materials used in the construction of the tanks are long-lasting materials
that will not harm the fish, will not change the quality of the water. For example, a fish pool

made by welding iron sheets will rust after a while and change the water quality in the future

and become harmful to the fish. In addition, since the iron carries heat quickly, it will be very
difficult to control the water temperature. The most suitable materials for the production of

fish tanks are polyester, fiber polyethylene (PE), etc.

Picture 18 Plastic materials used for different purposes but also can be used as geothermal
tank, barrel (left) IBC tank (right)

6.1.1. Rectangular Tanks

They are rectangular or square shaped tanks. In fish production, they are mostly used for fish

transport, but the ones with less depth can be used as larvae and juvenile fish tanks. They are
not very suitable for fattening fish production. Although the water is ventilated and

homogeneously distributed all over the tank, dead spots in the corners and blind spots where
the water does not change remain.

Another variant of rectangular tanks is rectangular shape tanks with rounded corners. They

are mostly ideal for juvenile fish. In these tanks with a flat bottom, the water inlet and outlet

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