Speaking of white spot disease, I think most fish lovers have encountered it, which is easy to appear in closed environments of fish tanks. The white spot disease in the fish tank is more troublesome to treat, because its infectivity is relatively strong, the treatment time is relatively long, it is easy to recur, often the white spot disease is not cured, and the nitrification system of the fish tank collapses first.
Today we will talk about this disease in detail, not only so that you know how to treat it, but also know why it is treated. After reading this article, the treatment of white spot disease is a piece of cake for you.
White spot disease is one of the most common fish parasitic diseases, white spot disease, also called small melon worm disease, is caused by the parasitism of small melon worms under the skin, tail fin and gills of fish. Parasitic melon worms suck the nutrients of the fish body tissue and stimulate the fish body to secrete a large amount of mucus, and the surface of the diseased fish will form a white pus bubble, which will spread all over the fish.
Small melon insects are divided into three stages: trophozoites, cysts and predators, the trophozoite stage is the stage of parasitism in the growth and development of fish, the sac stage is the stage of growth and reproduction of the insect body leaving the fish body, and the predator stage is the stage of the larvae of the small melon worm leaving the capsule to find a new parasitic fish body.
The three stages of the small melon worm correspond to the performance of the fish body we see, that the fish body has white spot disease and pustules (trophozoite stage, the small melon worm develops in the fish body), after a few days the white spot is lost (the bag stage, the small melon worm is separated from the fish body to develop and reproduce), and after a few days, it is found that there are white spots in other fish (predator stage, the small melon worm larvae begin to look for parasitic fish bodies).
Treatment of white spot disease generally to do three things, first of all, the water temperature to 30 degrees, the whole cylinder of treatment of white spot disease drugs, can also be used 0.3% concentration of brine for a period of about 3 to 5 days of medicinal bath, while changing the water every other day a quarter, pay attention to the water change after the saltiness of the tank to maintain.
Generally after 3 to 5 days can be effective, but at this time do not take it lightly, every day to carefully observe the fish tank you have white spot disease symptoms of fish, generally no new cases within a week, you can think that the treatment is completely over.
When you find that there are fish in the fish tank that begin to appear white spots, you immediately start to take the drug, but the drug has been used for a few days without any effect. Don't worry at this time, this is normal, because the small melon worm is wrapped in various membranes for most of its life, and even if you use the drug, the drug cannot penetrate and kill it.
The white spots you see with the naked eye are parasitic melon worms, the outside of the insect body in this period is the protective layer of the fish, the drug is difficult to penetrate, and no amount of medicine will reduce the white spot on the fish body, unless they mature and detach themselves.
The treatment of white spot disease to heat up should be a common sense that everyone knows, and there are two main purposes for heating:
The first is to raise the temperature to the temperature that is not suitable for small melon worms. When the water temperature is 14-25 ° C, it is the most suitable temperature for the propagation of small melon insects, and when the water temperature is below 10 ° C or higher than 28 ° C, the development of small melon insect larvae stops or gradually dies. If the fish in the fish tank can adapt to the high temperature and can tolerate rapid heating, the water temperature of the fish tank will be rapidly raised to 30 or even 32 ° C, which will control the development of the disease very well.
The second is to accelerate the development of small melon insects. The time it takes for a small melon worm to complete its life history varies with changes in water temperature. At 24 °C, the life history is 4 days, and at 15 °C, it is 10 days, but below 10 °C, it often takes more than 1 month. Therefore, at low temperatures, adult worms are not easy to leave the fish body capsule, the drug effect is not obvious, the treatment cycle will be elongated, and it is easy to relapse. Even if the farmed fish are not tolerant of high temperatures, the water temperature must be raised to the maximum temperature they can tolerate, which can promote the rapid growth of small melon worms and leave the fish body faster, so that they can be killed with drugs.
There is a lot of debate on the Internet about whether to add salt to white spot disease. In fact, the salt itself will not have any harm to the small melon insects, but the small melon insects are very sensitive to external osmotic pressure, so we can use this feature to add salt to stimulate the small melon insects to leave the fish body, and then kill the small melon insects that are separated from the body, which can effectively shorten the treatment cycle and improve the treatment effect.
After research, it was found that there are two periods when the protection of small melon insects is relatively fragile, one is that the small melon insects begin to detach from the fish body at the end of the trophozoite, that is, the small melon insects begin to detach from the fish body, and the white spots on the fish gradually decrease, and the other is the period when the small melon insect larvae break through the bag and swim in the water to find new parasitic fish bodies.
So we have to take the drug for a week, so that the drug can kill it in two periods when it is more fragile, and there will be no resurgence.
