What is the fog in the breeding shed of Duobao fish?

If the temperature drops too fast, the moisture in the air will condense and fog will appear. There may be a problem with the sealing of the greenhouse, and cold air enters the outside. Before cooling, the greenhouse will be sealed in advance, which can basically be avoided. If there is fog.

In foggy days, the light intensity decreases, the photosynthesis of algae weakens, and the oxygen production decreases. Under the condition of constant respiration, the oxygen content in water will continue to decrease. At the same time, the weakening of light can directly affect the growth of algae, and it is easy to change water and fall algae.