An aerator is an aquaculture supporting machine that can increase oxygen in ponds, prevent and rescue fish floating heads, improve water quality, and increase pond fish production. Taking oxygenation using a kilowatt impeller oxygen aerator as an example, according to the determination, water depth of 2.5 meters, an area of ​​4 acres, oxygenation for 15 minutes to 20 minutes, will be able to prevent and save fish floating head, balance the upper and lower water layer of the dissolved oxygen in the pond effect.
The method of aerating oxygen with oxygen is introduced as follows:
1. At noon on the sunny days, the intensive fish culture pond is deep because of the deeper water, the light intensity in the upper and lower layers is not the same, the upper layer is strong in light, the water temperature is high, the photosynthesis is strong, the dissolved oxygen in the water is high, and even supersaturated; the lower layer is weak in light, and the water temperature is low. The effect is not strong or stopped, there are many oxygen consumption factors, the pool has low dissolved oxygen, and even oxygen debt. Under the influence of water density, the upper and lower water layers do not convective during the day. At night, when the temperature decreases, the upper water temperature also decreases. Convection of the upper and lower aquifers, and the repayment of oxygen debts, often leads to deterioration of the dissolved oxygen conditions in the pond and causes the fish to float. At the noon aerator is opened, although the upper layer of dissolved oxygen will be reduced, but the photosynthesis of phytoplankton is still in progress, the upper dissolved oxygen can still reach saturation. After the natural convection of the pool water in the night, the dissolved oxygen in the upper and lower layers can still maintain a high level, which can not only alleviate and eliminate the threat of floating heads, but also accelerate the material circulation and energy flow in the ponds, and allow the harmful gases at the bottom to escape into the air to improve the water quality. The purpose of purifying water quality is to play the function of aerator agitation and aeration. At noon to open aerator is generally not more than 1 hour.
2. In the middle of the night or early morning of rainy days, the cloudy days and continuous rainy days, due to lack of light intensity, the photosynthetic activity of phytoplankton is not strong, the oxygen production is low, and the oxygen consumption factor is high, so that the dissolved oxygen in the pond is reduced, and the supply is in short supply, and the pond condition deteriorates. At night, due to the respiration of bacteria, plankton and fish, they are prone to lack of oxygen, and in the middle of the night, they can cause fish floating heads. In the pools with better conditions, fish floating heads appear in the early morning. Therefore, in the cloudy days and continuous rainy days, usually in the middle of the night or early morning aerator, until 8 o'clock in the morning to 9 o'clock when the light is strong.
3. It was found that the floating heads of fishes were both turned on by intensive culture ponds due to excessive fertilization and feeding, which made it easy to cause water corruption and caused fish to lose oxygen. Once the fish is found to be floating, immediately start the aerator and give full play to the oxygenating function of the aerator. After the aerator is actuated, the dissolved oxygen in the nearby water body rises in a short period of time. The fish will automatically gather around the oxygen aerator to protect its life. It will not suffocate due to severe lack of oxygen, so as to rescue floating heads and prevent pan-pooling. purpose. In this case, the boot time is generally longer and should be until the fish automatically sinks into the water and disperses the activity.
In short, the correct and reasonable use of aerators can speed up the circulation of ponds and energy flow, improve and purify water quality, increase the stocking density of fish, and increase the amount of feeding and fertilizing. Under similar conditions, ponds using aerators can increase production by about 14% over control ponds.
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