Common diseases of parrot fish: white spot disease, black spot disease, skin mildew disease, mainly due to the deterioration of water quality leading to the growth of mold, or the skin of the fish is injured and parasitized by water parasites Caused by insect attack and damage to the skin. In the final analysis, water quality is the trigger for the emergence of these common diseases. It can be seen that it is very important to keep the water quality clean! In order to allow parrot fish to grow healthily in a good water quality environment, generally change the water every 2 to 3 days, and change a third or a quarter of the water each time.

1. White spot disease. Highly contagious ectoparasitic disease; infectious throughout the year with high morbidity and mortality.

Symptoms: In the early stage, there are individual small white spots on each fin and body, there is appetite, and the spirit does not change much; in the middle stage, there are white spots on the fins and body, no appetite, no activity, and itching everywhere , the color darkens; in the late stage, white spots are all over the body, and the fish floats on the water surface or sinks to the bottom of the box. The fish became weak, swayed from side to side, increased mucous membranes on the body surface, had difficulty breathing, and suffocated to death.

Treatment: Comprehensive treatment is required for this disease, and only medication has little effect. It is very important to strengthen feeding and management. First, stop eating for 4 to 5 days to reduce pollution; at the same time, keep the water temperature constant, and it is better to raise the temperature 2 to 3 °C higher than the original water temperature. In the absence of aquatic plants, it can be properly administered, because aquatic plants are sensitive to various drugs and die quickly.

1) In the early stage, 0.5%~1% salt can be put in, and certain effects can be achieved.

2) The whole box can be sprinkled with 1~5ppm of nitrofurazone powder in the early and mid-term. Dip a match stick with methyl blue crystal powder and rinse it into the sick fish box to change color, and it has a good effect.

3) In the early and middle stages, put red mercury into the water and turn it into light red, which has a good effect of eliminating pathogens, but it cannot be used repeatedly. Because mercury is toxic, fish is not easy to excrete.

4) In the middle and late stages, the specific drug is mercurous nitrate, but fish are very sensitive to this drug, which is easy to cause death, so it is generally not used. A 90×45×60 (cm) box is enough to put a piece of mung bean, and this medicine cannot be used repeatedly. The Beijing Zoo has a high cure rate for this disease, and generally suffers little loss.

2. Black spot disease. A very common ornamental fish disease that occurs throughout the year.

Symptoms and lesions: The fish grows black spots, which are gray-white, and the hyphae entangle and adhere to the cells and tissues of the wound, causing tissue necrosis. At the same time, the sick fish lose their appetite and eventually die.

Treatment: A small amount of salt can be placed in the aquarium where new fish are stocked to inhibit the occurrence of water mold, and attention should be paid to cleaning and disinfection when placing live bait. The water is kept clean to prevent the growth of water mold. This disease can generally be prevented.

1) Sprinkle the mixture of 250 grams of salt and 250 grams of baking soda on the fish tank of 100cmx55cmx45cm, persist for several times, the effect is remarkable.

2) Dissolve 0.3 g of malachite green or methylene blue in 100 kg of water, soak the fish for 10 to 20 minutes, and the mycelium will fall off after a few days.

3) 2%~3% saline immersion, once a day, 5~10 minutes each time.

4) Mix two parts per million (2ppm) potassium permanganate with 1% salt water and soak the sick fish for 20~30 minutes.

5) Increase the water temperature to inhibit the growth of water mold. And a 15-watt UV lamp can be irradiated for several hours a day to effectively inhibit and eliminate water mold.

3. Skin mold. Also known as saprolegnia and white hair disease, it is one of the most common diseases of ornamental fish. Skin mildew can appear all year round, and is most common in early spring and late winter.

Symptoms: The fish body infected with mold usually has a layer of white shading on the skin, especially black and red fish, which lose the luster that the fish should have. Subsequently, the activity is sluggish, often sluggish, and floats on the surface of the water. If not treated in time, the fish body mold will spread, the muscles of the affected area will rot, loss of appetite, and eventually death.

Treatment: In order to prevent the occurrence of saprolegnia, attention should be paid to prevent damage to fish and parasite bites during operation, and a small amount of salt can be added to the water to inhibit the occurrence of saprolegnia. When it is found that the fish is infected with saprolegnia,

1) can be immersed in 3% salt water, once a day, for 5~10 minutes each time,

2) or use a hundred Two ten thousandths (2ppm) potassium permanganate solution and 1% salt soak for 20~30 minutes,

3) or use one to two millionths (1~2ppm) malachite green Soak in solution for 20~30 minutes,

4) or soak with 1/2 millionth (1~2ppm) methylene blue solution for 20~30 minutes,

5) or dipping with five parts per million (5ppm) nitrofurazone solution,

6) using 0.02 parts per million (0.02ppm) malachite green solution, ppm 0.3 (0.3ppm) formaldehyde solution is poured directly into the aquarium to inhibit the growth of mold.

7) The water temperature can be increased to inhibit the growth of water mold. Install a 15-watt UV lamp on the top of the aquarium, and irradiate it for several hours a day, which can effectively inhibit or eliminate the breeding of water mold.