A water flow rate of 100 lt/sec is required to establish a trout production facility. If trout production is desired in a source with less water quantity, there may be a heating problem. This situation causes a dangerous environment for fish production. It can be said that 6-9 tons of fish will grow in a spring with 100 lt/sec of water. However, in case of a good planning, it can reach 15-20 tons of trout. 0.5-1 lt/minute of water should be calculated for 1,000 eggs, 1-3 lt/minute for 1,000 fry aged 0-2 months, and 1 lt/minute for 1,000 fish aged 4-8 months. For example, if the fish fry are 7 months old, it can be calculated that 7 lt/minute of water is required for 1,000 fish. In the calculation of the water required by the fish, the increasing age of the fish as well as their development status should be taken into account. In well-fed and fast-growing colonies, the water requirement should be slightly higher. It should not be forgotten that the water requirement plan is very important in fish farming.
Current Speed and Water Depth
The growth rate of trout is directly related to the amount of oxygen in the water and water temperature. The change of oxygen in the water is proportional to the change of water in the net cage. In trout farming with net cages at depths below 4 meters, 150 liters – 180 liters of water exchange is needed for 1000 surface area. Therefore, the current velocity must be sufficient to provide this exchange. A distance of at least 1 meter is required between the bottom of the environment where the net is placed and the bottom of the net bag of the cage.
