Two big headaches in summer: how to avoid heatstroke

In Shenzhen in May, the weather is so hot that you can roast it on the road, and there is a risk of heatstroke indoors and outdoors (except air conditioning). People can't stand this weather, so what about our fish? Will it be stuffy? So in summer, fish friends should be most concerned about how to prevent fish heatstroke and stuffy tank. But heatstroke and stuffy vats are two similar but different situations, so how to distinguish and take relevant measures? Please look down!

Heatstroke

It usually refers to the phenomenon of serious dysfunction of the central nervous system of ornamental fish caused by excessive water temperature and low water-soluble oxygen, which often occurs in the afternoon in the hot summer season, most of which are mainly due to the failure to cover the curtain and shade in time, resulting in excessive water temperature. thus reducing the amount of dissolved oxygen in the water, resulting in fainting caused by high temperature, hot sun stimulation and hypoxia.

Stuffy cylinder

Usually the weather is muggy, the air pressure is low, the water temperature is high, and there are showers and torrential rain, which makes the water temperature in the tank change sharply, resulting in rapid convection of the upper and lower water in the tank, and a rise in feces and dirt at the bottom of the tank, resulting in the death of fish due to anoxia, especially when the green algae keep photosynthesis at night, they consume oxygen in the water together with the fish, causing the fish to lack oxygen, float for a long time, and die.

Heatstroke and stuffy tank do serious harm to ornamental fish, mostly in the afternoon or night in hot summer, especially in muggy weather.

Pathogeny

The suitable temperature for the growth of warm-water fish is 23-28 ℃, but in summer, the temperature often reaches more than 33 ℃, sometimes as high as 40 ℃ around noon. In the hot season, if no shading and cooling measures are taken, the water temperature will increase with the increase of air temperature. When the water temperature reaches 35-39 ℃, the dissolved oxygen in the water decreases, resulting in fainting caused by high temperature, hot sun stimulation and hypoxia. When there is air conditioning and cooling in the room in summer, heat stroke will also occur when the tap water that has been basked in the sun is changed directly. In the case of muggy and high temperature, the severe convection of the upper and lower water caused by showers or torrential rain causes the dirt at the bottom of the pond to rise, especially at night, algae also consume oxygen, resulting in too low dissolved oxygen in water, and ornamental fish will die from lack of oxygen.

Main symptoms and pathological changes

Heat stroke or stuffy fish float on the water surface, some constantly hit the cylinder wall, breathing difficulties, body color gradually fade, some around the mouth or fin capillaries congested, float for a long time, and gradually die.

Prevention and cure measures

The principle of prevention and control is to strengthen feeding and management, control water temperature, maintain good water quality, and replenish oxygen in water in time.

In the hot season, the ornamental fish raised outdoors or on the balcony should be covered with a curtain at about 9: 00 in the morning to avoid hot sun exposure and cause heatstroke.

Clean up the dirt in the fish pond (tank) regularly to maintain good water quality. Especially before the rainy season, it is all the more necessary to do a good job in cleaning up and properly inject new water. Immediately after the rain, suck off the old water at the bottom of the pool (tank) (about 1 beat, 5 seconds, 1 hand, 3), and inject new water to prevent the tank from stuffing.

For the fish that have not stopped breathing, it is necessary to change the water immediately to cool down, or drop 2-3 drops of hydrogen peroxide into the water or use an oxygen pump to increase oxygen. The fish that has just stopped breathing can also be rescued by artificial respiration, by blowing violently into the mouth of the prospective fish several times, then splashing water at the mouth of the fish, or holding the diseased fish by hand and shaking back and forth in the water, and gently pressing the fish's abdomen for a few minutes.