How about dissolved oxygen?
How about dissolved oxygen?
from ECO WATER China
With the continuous development of the global aquaculture industry, the phenomenon of water eutrophication caused by high-density aquaculture and feeding a large number of artificial full-price feeds are becoming more common. Subsequently, concepts such as water quality management have gradually been accepted by aquaculture practitioners.
So, what should water quality management do?
If they fail to answer this question, indiscriminate use of various drugs and preparations may impose additional burdens on the water body and reduce its self-purification capacity.
In the daily breeding process, dissolved oxygen in water mainly comes from the following four aspects:
- Oxygen is produced by the photosynthesis of aquatic plants. Aquatic plants are major producers of dissolved oxygen in cultured waters, including various algal populations as well as a variety of submerged and floating plants.
- Rainfall, snowfall, and surface runoff into aquaculture water can also bring a certain amount of oxygen, but they also may bring nitrogen, phosphorus, sulfur, and other nutrients.
- Nitrogen and oxygen in the air can be directly dissolved in water under certain conditions. The use of agitating or wind waves will also speed up the dissolution of oxygen from the air into the pond water.
- chemical oxygenation; the addition of an oxygenating agent artificially; when necessary, agents such as calcium peroxide, sodium percarbonate, H₂O₂, and other oxygenating agents can also rapidly increase the dissolved oxygen content of water; these are also commonly used water hypoxia emergency drugs.
In traditional aquaculture, water-soluble oxygen consumption mainly includes:
1. the growth of fish and shrimp respiration and oxygen consumption; 2. the oxygen consumption of zooplankton, bacteria, and microorganisms; 3, oxygen consumption by submerged plants, algae, and other plants; 4. Oxygen consumption when microorganisms decompose dead organisms, feed residues, fish feces, and other organic matter; 5. Oxygen consumption of some aquatic inputs (fishing drugs and preparations); 6. The escape of dissolved oxygen after saturation in water is also a part of dissolved oxygen consumption.
Dissolved oxygen content detection, particularly in the bottom water area, is a daily service task that must be completed by frontline aquatic technical service personnel.
Maintaining a high concentration of dissolved oxygen in the whole water body is the basic guarantee for the success of aquaculture and is also the main daily "water transfer and detoxification" work of aquaculture operators!
As long as the highly dissolved oxygen in the whole water body is maintained, nitrite, ammonia nitrogen, H₂S, and other toxic and harmful substances will not accumulate in large quantities, let alone cause serious harm to the breeding objects.
