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Nematodes in an aquarium

maintenance, care, compatibility

The parasites in the aquarium, which appear most often, include nematodes, turbellarians, planarians. Nematodes cause the least harm to aquarium inhabitants; they look like small, small, whitish worms.

Nematodes move freely in the water and the main reason for their excessive reproduction is a large amount of feed.

Planarias and turbellarians belong to dangerous worms in an aquarium.

  • Planaria these are flat worms, they have a body from several millimeters to three centimeters long. They are mostly white, but there are parasites and brownish and even reddish. Planarium can be distinguished by a triangular thickening at one of the ends, this is the head. Also, these worms very smoothly glide in the water without stretching and not contracting. Planaria are detected when there are already a lot of them, since they are hidden in the ground in sunlight. The number of these parasites increases when there is a lot of protein in the water, and hungry worms can devour the eggs of fish and penetrate into their gills.

  • Turbellarians or Ciliated Worms they destroy fish eggs, and fry suffer from these parasites. On the body of turbellarians there are rabdites, peculiar sticks, which the worm shoots at its enemies. Getting on the body of fish, Rabtids lead to the formation of wounds and cause paralysis. The main reason for the reproduction of ciliary worms is poor hygienic conditions in the aquarium. Turbellaria can be identified by a calf just a few millimeters long, these parasites are white or brownish in color. They prefer to stay ciliary worms on stone, glass, algae.

They remind worms in an aquarium and hydras, when there are a lot of them occupying almost the entire space. Hydras are not harmful to fish, and you can reduce their numbers by launching pond snails into the water.

If white worms appeared on the walls in the aquarium

Planaria is a flatworm that can appear in a freshwater aquarium. Planaria fall into the water with untreated soil, plants, decorations, and live food. Bringing out these worms is quite difficult, as they can recover quickly.

There are mechanical ways of destroying worms — a trap is set in the tank, and in the morning it is taken along with the worms. After that, worms are thrown into boiling water, and boiled for 30 minutes to complete destruction. The problem is that this method is not always effective.

These worms are dangerous for snails, crayfish and shrimps.


Planaria worms have hair on their bodies, or the so-called cilia. There are many types of planarians. In home ponds worms are usually infused the following groups:

  1. Dendrocoelum lacteum, or milky white worms. They are considered safer, do not cause severe harm to the inhabitants of the aquarium. They are easy to see in glass containers, especially on the walls and dark decorations.
  2. Planaria torva, or brown planaria – they are harder to notice because of the dark color, are active at night.

Watch the video about planaria and how to deal with it.

All planarian species of this species feed on protein products, including: shrimp eggs, small invertebrates, crayfish and shrimp feeds. Unfortunately, brown planaria can destroy the shrimps themselves from the inside, settling under their armor. How can you destroy these worms in a home aquarium?

The first and most important way is to clean the stones and scenery. From worms they can be washed off with water and treated with boiling water.

This also applies to the soil that needs to be removed from the tank and boiled.

Use special traps that you can cook with your own hands. Take a cheesecloth, make a small bag out of it, into which you should put small pieces of meat.

In the morning you will notice that the entire bag is filled with worms. He, along with the planarians need to extract from the aquarium, and destroy.

Traps do not give a full guarantee of the destruction of these organisms, only reduce their numbers. There may still be many worms under stones, snags and decorations.

You can also pass an electric current through the aquarium water with a charge of 12 volts. In such actions, you must comply with security measures, and before the procedure, remove all pets from the tank, their eggs, fry, and plants.

Warm water with a temperature of 27-29 ° C can quickly destroy unwanted “guests”. But not all fish tolerate this temperature.

Worms can be destroyed with the help of special preparations. They are very afraid of the means that include fenbendazole, they are: Fluendazole, Panacur, Fluvermal, Fliubenol.

Before use, carefully read the instructions. Usually the main dose is 0.2-0.4 grams per 100 liters of water.

The preparation needs to be diluted in water, and then brought into the aquarium. Nowadays fenbendazole is sold as a suspension.

In a few days you will see the dead worms, and the only thing that remains for you is to cleanse your body of water from them.

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