Why do fish die and what causes them

There can be many reasons why a fish dies, and here are some of the possible causes:

1.Improper diet: Overfeeding can cause enteritis in fish.

2.Water quality problems: such as ammonia nitrogen poisoning, which is usually caused by water contamination in fish tanks.

3.Uncomfortable water temperature: Fish are ectotherms, and the water temperature directly affects the growth and survival of ornamental fish.

4.Quality problems: If the fish you buy has quality problems in itself, this will also lead to the death of the fish.

Fish have many risks and dangers in the natural environment, so the mortality rate of fish is relatively high. Here are some of the reasons why fish often die:

1.Water quality problems: Fish have high requirements for water quality, if the water contains too many pollutants, ammonia, nitrate and other harmful substances, or the imbalance of oxygen and carbon dioxide in the water, it will affect the health of the fish, and even lead to their death.

2.Dietary problems: Fish need the right amount of nutrients to stay alive, and if they eat an unbalanced or excessive diet, it can lead to digestive problems and diseases in the fish, and eventually lead to the death of the fish.

3.Temperature problems: Fish are more adaptable to water temperature, but if the water temperature is too high or too low, it will affect the physiological function of the fish, leading to disease and death.

4.Diseases, Parasites and Bacterial Infections: Fish are susceptible to diseases, parasites and bacteria, which, if left unchecked, can aggravate the disease, leading to death.

5.Harvesting and transporting: During harvesting and transport, fish are susceptible to injury, fright, and stress, leading to impaired bodily functions and ultimately death.

In short, the length of fish life is affected by a variety of factors, and only by ensuring that the water quality, diet, temperature and other conditions are appropriate, and appropriate disease prevention and **, can the survival rate of fish be improved.

The fish in the fish tank at home are always dying, most of them are breeding technology problems, and the unnatural death of ornamental fish mainly has the following factors:

1. The water temperature exceeds the tolerance range of the feeding object or fluctuates violently in the range;

2. The pH value of water quality exceeds the tolerance range of the object of feeding and raising or has violent fluctuations in the range;

3. The hardness value of the water exceeds the tolerance range of the feeding object or has violent fluctuations in the range;

4. Improper trapped tap water, and the residual chlorine exceeds the standard;

5. The feeding density is too large, resulting in hypoxia;

6. Improper setting of the filtration system or mismatch of treatment capacity, resulting in ammonia nitrogen and nitrite poisoning;

7. Nitrate and phosphate poisoning caused by poor nutrient control (only for marine fish);

8. Fighting injuries caused by conflicts between polyculture breeds;

9. Pathogenic bacteria and parasitic infections.

For newbies who are old and dead fish, give the following advice:

1. Don't be too provincial in feeding equipment, testing reagents, etc.;

2. Don't be too greedy to raise too many quantities at the beginning;

3. Carefully understand the requirements of each breed raised.