How to Use an Oxygenator Correctly


Release time:

2022-03-14

Many farmers have a significant misunderstanding about the level of dissolved oxygen in water. People often assume that aquatic plants and algae can carry out photosynthesis and thereby provide dissolved oxygen. As long as there’s sunlight, they believe the water body will never suffer from oxygen deficiency. Let’s take a closer look below at how to properly use an aerator.

  Many farmers have a significant misunderstanding about the level of dissolved oxygen in water. People often assume that aquatic plants and algae can carry out photosynthesis and thereby provide dissolved oxygen. As long as there’s sunlight, they believe the water body will never suffer from oxygen deficiency. Let’s take a closer look below at how to use it correctly. Aerator

  As we all know, aerators can stir up water layers, helping oxygen from the air dissolve into the water. However, aerators also play an even more critical role in promoting convection between the upper and lower water layers, exchanging oxygen-rich dissolved water from the upper layer with water from the lower layer—and thereby preventing a host of problems caused by excessive hypoxia in the bottom waters.

  When is it appropriate to start the aerator? It can be divided into three main time periods.

  (1) A sunny noon

  On clear days, noon is the period when algae and aquatic plants in water bodies undergo vigorous photosynthesis; therefore, there should be circulation between the upper and lower layers of the water. This not only prevents oxygen depletion in the bottom waters but also helps to avoid the water body from heating up too rapidly during the day.

  (2) On a cloudy morning

  The water body experiences severe oxygen deficiency in the early morning. On cloudy days, plant photosynthesis is reduced, so it’s important to turn on the aerator at this time.

  (3) Continuous rainfall should be opened in advance.

  Continuous rainy days can reduce photosynthetic efficiency, so it’s even more important to start the aerator in advance. We recommend turning on the aerator at dusk when encountering consecutive rainy days, to prevent shrimp from suffocating and dying due to oxygen deficiency. Once large-scale oxygen depletion occurs in the water body, promptly use oxygen-boosting products to rapidly increase the dissolved oxygen levels, thereby effectively halting further losses.

  Currently, there are various oxygen-releasing products available on the market. Traditional oxygen-releasing products are limited by technological and formulation constraints. Typically, it takes 3 to 8 hours for these products to release oxygen in a concentrated manner. In contrast, high-concentration oxygen-releasing products rapidly release oxygen within a short period, easily causing excessive oxygen levels in the water body. They also tend to linger poorly in ponds and can be highly irritating to cultured aquatic animals. Moreover, these products are costly to use and require frequent manual monitoring and supplemental aeration.


Related News

The relationship between water convection and dissolved oxygen levels in aquatic bodies: The introduction of an aeration device can effectively regulate dissolved oxygen levels.

Although fish floating to the surface can be caused by a variety of factors, in addition to excessive stocking density, overloading the total fish biomass, and poor water quality, the convective properties of water are also a major factor that cannot be overlooked. Simply put, when water temperature is low, its specific gravity (or density) increases, causing it to sink; conversely, when water temperature is high, its specific gravity (or density) decreases, making it float upward. Understanding and mastering the principles of water convection will greatly facilitate the smooth operation of aquaculture. On warm days, after being heated by the sun during the day, the warmer, lighter water tends to stay on top. As the sun sets and the air temperature begins to drop, the upper layer of water cools down, increasing its density, and gradually starts to sink. If the nighttime temperature remains relatively high, the water cools down slowly, and the upper layer won't reach the bottom of the pond until early morning. This is one of the main reasons why oxygen levels tend to drop sharply from late night into early morning on hot days. However, if a heavy rainstorm occurs in the evening, the situation changes dramatically. The cold, heavy rainwater quickly sinks to the bottom of the pond, stirring up sediment, leftover feed, fecal waste, biological residues, and other organic matter from the pond bottom and bringing them into the middle and upper layers of the water. These harmful organic substances rapidly deplete the dissolved oxygen in the water. Before dawn even breaks, the dissolved oxygen in the water may be completely used up, leaving the fish vulnerable to oxygen depletion and causing them to float to the surface—a phenomenon known as "floating and surfacing." Therefore, sudden heavy rainfall in the evening or at night can also lead to oxygen depletion and fish floating to the surface.

2020-11-12