scientifically 1. Reason: The parrot fish prefers new water. If the water is not changed for more than 5-7 days, the parrot fish will become lighter in color or appear black gauze on the body surface. If the temperature difference between the new water and the old water is too large when the water is changed, it will also stimulate the parrot fish. If the water is changed too much, the black veil will appear on the body of the parrot fish.
2. Treatment: If the frequency of changing water is not frequent enough, you can change water frequently, preferably once every 2-3 days. If the temperature difference is too large, the temperature of the new water and the old water can be adjusted to be the same when the water is changed. If you change too much water, you can reduce the amount of water you change by one third each time. Excessive temperature difference and excessive water change will only lead to the temporary appearance of black veil in parrot fish, which will soon disappear as long as the breeder handles it in time.
1. Reason: Parrot fish are timid, and a slightly louder sound will frighten them. When parrot fish are too frightened, they will produce black veil.
2. Treatment: Move them to a quiet place to rest, and when they recover their own calm, the black veil will disappear. Keepers had better not put the fish tank in a place where people can easily pass by, nor beat the fish tank with their hands, nor shout at the parrot fish.
1. Reason: If they get black spot disease, this problem will also occur. Because the early symptoms of the disease are black gauze, black spots, black lines and so on on the surface of the fish.
2. Treatment: If the patient's condition is not serious, salt can be sprinkled to sterilize according to the proportion of five thousandths. If the condition is serious, malachite green solution can be added in the proportion of three thousandths, or 2 ppm potassium permanganate solution can be used for medicated bath treatment.
