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Kostioz – a common disease of aquarium fish

Hello to all readers of Aquablog. Today, the post I will have about such an invasive disease of aquarium fish as kosoz.

The causative agent of this disease is a flagellate parasite belonging to Ichthyobodus or Costia. Absolutely all species of aquarium fish are susceptible to bone disease, but the young are most susceptible. As you remember, I somehow wrote a series of articles about aquarium fish diseases, where I listed and in a small volume described the main sores.

Now, I reviewed my plans for the articles and decided that it would be better to look at each disease in more detail, and for this very purpose I am writing this post.

There will be a lot of articles on this topic, in what sequence they will be published, I do not know yet. One thing I can say for sure: blog headings will be filled in turn, unless you have to divide one topic into several parts.

But let’s still go back to our kosiozu.

In today’s article we will look at the following aspects:

– how does boneosis infection occur;

– preventive measures and medicine for kosiosis.

As I have already said, bone diseases cause parasites of flagellates from the family Bodonidae. The parasite has a drop-shaped oval body, in length it rarely exceeds 13 microns, and at the end of the body there is a pair of flagella, thanks to which this reptile attaches to everything, including poor fish.

What is dangerous bone disease? This disease affects the skin of the fish, and subsequently abundant mucus secretion.

Basically, these parasites are present on the skin of almost all species of fish, despite the fact that the fish do not seem sick. The impetus for the development of this disease can serve as stress, which leads to a weakening of the immunity of the fish, which is just on hand.

As a result of this confluence of circumstances, the parasite begins to actively multiply to an incredible population.

How this parasite can get into the home aquarium, you ask? Very easy: it gets into aquariums with soil from natural ponds, plants, food, maybe on the fish bought in a store where the bank was infected, and the polite and honest seller didn’t say a word to you about it.

Also, an excessive rise in the temperature of the water with an acidic environment and old water can contribute to the development of bone disease in an aquarium. An outbreak of the disease can be seen at any time of the year, but in most cases, this happens in the summer, when it actively propagates in water bodies and is brought into our banks along with live food, like bloodworms and pipe worker.

As soon as the parasite enters the aquarium, it is vital for him to find a victim for a couple of hours, or he will die. Consider this point if you resist the disease: you will only need to catch all the fish affected by kosoz, transplant them into quarantine and raise the temperature there to 30 degrees for a couple of hours. This way you get rid of kosyoz without any problems.

At a temperature of 30-32 degrees Celsius, the parasite also dies, so experienced aquarists recommend therapeutic procedures in warm water aquariums. But you can see not logicality: why do we create optimal conditions for the pathogen?

And this is done so that the body of the parasite becomes round and it loses mobility, not completely of course. In this state, it can be long viable. When you create favorable conditions for the parasite, the parasite begins to actively look for another victim, and this requires large amounts of energy, which he does not actually have.

If, nevertheless, the parasite found the victim, then it can be a fish of any kind and age. Zhgutikonosets attached either to the gills or to another part of the body of the fish, begins to quickly divide in two.

If the conditions for breeding the parasite are favorable, then over time you will see on the gill apparatus of the fish a huge population of parasites. Since ichthyobodo eats the epithelium of the fish, it will gradually cause irritation of the tissues of the petals of the gills and skin.

Then begins the increased mucus secretion, which is food for the parasite. Why sore stronger scary for young? The fact is that weak fry tolerate this disease very hard, especially if the active reaction in the aquarium is acidic and the water hardly aerates and does not change for weeks.

Rarely, when an adult individual dies from bone disease, it basically serves as a carrier for the parasite. However, if the fish is not cured, then at least one corpse in the aquarium will be more.

First, there is irritation of the skin of the fish and they often begin to swell on the aquarium soil, stones or plants. Then the fish refuses to eat and stops responding to external stimuli.

Behind this comes heavy breathing, which will be seen if you look closely at how the fish will suffocate with a normal concentration of oxygen in the water. You can read about the importance of oxygen in the aquarium here.

After some time, the fins of the fish stick together and the fish begins to swim as if swaying. In rare cases, there was destruction of the space between the rays on the fin.

A little later, at the base of the tail, on top of the ridge and around the eyes, a bluish bloom forms, which will be perfectly visible if you look at the fish from above.

When a fish develops excessive mucus secretion, the skin becomes dull. which is most often seen between the dorsal fin and the head of the fish. In rare and severe cases, the skin can peel off in strips. A little later, gray-blue specks form on the fish of patients with kosiozom, which later will turn into a veil of a milky color or a continuous grayish bloom all over the body of the fish.

The areas of fish that have undergone the most disease begin to decompose.

Another characteristic symptom: if you look at the fish from above, you can see a slightly protruding lid of the fish’s glow. Inside the gills gelatinous mass tightly overlaps respiratory folds. The gills beaten by the infection become anemic, become covered with mucus, turn pale.

The coating of mucus contributes to poor absorption of oxygen. Also, among other things, necrosis of gill lobes may develop.

If pathogens of kiosiosis occur in the general aquarium, the entire aquarium will have to be treated, since all the fish will either be infected or will be carriers, and in the end will also be infected. In practice, the following treatment regimen was best recommended: During the first two days, you need to gradually raise the water temperature to 32 degrees with powerful aeration by feeding fish twice a pipemaker or bloodworm.

As you already know from the above, the flagellate carrier does not tolerate the heat, which will kill some of the parasites.

On the third day, all the fish are caught from the aquarium and placed in a special aquas, which make a solution of salt in the proportion of 100 grams per 10 liters of water for 30 minutes. After half an hour, the fish are transferred to another vessel with clean water and after a few hours they need to be fed with bloodworms.

On the fourth day, sick fish should be treated with copper sulphite in the proportion of 1 gram of 10 liters of water with an exposure time of 20 minutes. After that, the fish again need to put the fish in a clean aquarium and after half a day to feed the bloodworms.

On the fifth day, it is necessary to add a solution of the main purple K to the tank with fish and it is necessary to withstand sick fish for five days without forgetting about intensive aeration and feeding the fish with live food.

At the end of the treatment, the fish are returned to the general aquarium where the temperature should be 32 degrees, and after a couple of days it should be lowered to normal. Pay particular attention to the temperature conditions in the infected aquarium.

While you will treat the fish for 10 days, maintain an optimal temperature that will be optimal for most sores caused by parasites, that is, within 24-27 degrees. At this temperature, the parasites are activated and begin to actively look for a host.

And how do you remember from the above read: if the parasite does not find a carrier for itself within three hours, then it dies from exhaustion.

If kosioz massively developed in the general aquarium, there is no sense in treating its inhabitants with such a jar. In this case, fish are treated with short baths where anti-parasitic agents will be located.

Potassium permanganate can be used as a solution (shine for 5 days); salt solution (treat week); chemically pure copper sulfate (treated for 4 days and every day a new solution); solution of malachite green, basic purple and formalin.

If you do not have a separate aquarium for the treatment of sick fish, then medicinal preparations are brought into the general aquarium. Fish should be removed from the aquarium, and the temperature in it should be raised to 30 degrees for the whole daylight hours and include enhanced aeration.

For 5-7 days, the parasites will completely die in the aquarium. In order to prevent the increase in temperature in aquas to 32-34 degrees.

New purchased fish must be kept for a month in quarantine, no less. After this, the fish must be passed through the prophylactic bath three times, and only after that can they be placed in the general aquarium of new inhabitants. In no case should water be allowed to enter the aquarium in which you kept live food.

In addition, ground, feed, plants from natural water bodies should not be allowed to enter the general aquarium.

P.S. The joke of the day:

Worse than a pebble in a shoe can only be a grain of sand in a condom 🙂

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