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The fish pond aerator is a kind of aeration equipment that uses the high pressure of the fan to deliver oxygenated air to the water. It can not only prevent and reduce the floating head, but also improve the water quality, strengthen the pond water circulation, and promote the reproduction of plankton. It is a scientific breeding. Fish, increasing the breeding density, increasing the production per unit area of aquaculture, and then improving the economic benefits of aquaculture are important measures that have been widely promoted and applied by the majority of aquaculture professional households and breeding bases.
Many fish farms use aerators, but when should they be used and what should not be used, in the past, it was summed up in one sentence, that is, three openings and two openings, what is three openings? It opens early in the morning the next day on a cloudy day, opens at noon on a sunny day, and opens as early as possible in the middle of the night when it rains continuously; when will it not open? It does not open in the evening, and does not open at noon on a cloudy day. Of course, with the renewal of equipment, there have been probes that continuously monitor dissolved oxygen 24 hours a day, like automatic aeration controllers, and a variety of dissolved oxygen monitors with automatic switch aerators. It can be described as diverse. But no matter how good the mechanical equipment is, when it is broken, excessive reliance will result in painful lessons. The data can be referred to, but the principles to be understood must be understood. Today, I will talk about this. Whether the aerator can be turned on or not, when to turn it on, as some say, it is turned on 24 hours a day, as long as the electricity bill is free, of course this is also a method.
There are many sources of dissolved oxygen in the water body. Among them, the algae produce oxygen, which accounts for more than 80% of the dissolved oxygen in the entire water body, while the proportion of mechanical oxygen increase is about 10% or even lower. Therefore, algae aeration is highly efficient and low-cost, while aerator aeration is low-efficiency and high-cost. How to use it can be based on the following table. This data is not fabricated by me. There is a piece that was published in the journal Scientific Fish Schedule of published articles. According to the data obtained from the research, it goes without saying that it opens early in the morning on a cloudy day, but why does it open early in the middle of the night when it rains continuously? It is to consider rainy days, insufficient sunlight, insufficient oxygen production by algae photosynthesis in the water body, so it is necessary to supplement the dissolved oxygen in the water body at night through the aerator to play the role of 120, turn on the aerator as soon as possible, and prepare for emergency. And why doesn't it open at noon in continuous rain? That is due to continuous rain and weak photosynthesis. The dissolved oxygen in the water body has not reached saturation at noon. If the aerator is turned on, some of the dissolved oxygen in the surface water body will be aerated, and the important thing is that after the upper and lower water convection At night, the dissolved oxygen in the upper-middle layer of water will be lower.
For the same reason, why does it open at noon on a sunny day, but not in the evening? It is because at noon on a sunny day, direct sunlight, strong photosynthesis of algae, and supersaturation of dissolved oxygen in the surface water of the aquaculture water. At this time, the aerator is not used to increase oxygen, but to use such as impeller aerators, Surge machines and swing aerators agitate the water body, promote the convection of the upper and lower water bodies, and increase the dissolved oxygen in the lower-level water body with low dissolved oxygen, thereby increasing the dissolved oxygen content of the entire water body. Similarly, in the evening on a sunny day, the dissolved oxygen of the surface water in the water body has reached level. At this time, there is no oxygen shortage in the water body. When the aerator is turned on, not only can it not play the role of aeration, but through the aeration of the aerator, Reduce the dissolved oxygen in the surface water. Therefore, do not open the aerator in the evening on a sunny day.
In conclusion, the vast majority of fish species in the country nowadays, in the case of low-profit breeding, if the yield per mu is not tens of thousands of catties, then use the aerator as a aid 120, which can also be used to stir the water body at ordinary times. , To promote the convection of upper and lower water bodies, it is not recommended to use aerators as the main source of dissolved oxygen in the aquaculture water. After all, 90% of the dissolved oxygen in the water body comes from the photosynthesis of algae, which means that the proportion of the oxygen increase by mechanical equipment in the dissolved oxygen in the water body does not exceed 10%.