Posthorn snail | The cleaner of pond water!
Chris van der Velde
The posthorn snail, also called Planorbarius corneus, is a freshwater snail found in still or slow-flowing waters in Europe. It is a fairly small snail, usually no larger than 2 centimeters, with a distinctive cone-shaped shell that resembles an old-fashioned posthorn, hence the name.
All about the posthorn snail
- How does a posthorn snail get into the pond?
- Important to know
- What do posthorn snails eat?
- Where does the posthorn snail live?
How does a posthorn snail get into the pond?
A posthorn snail can enter a pond in several ways, for example:
- Purchase: Posthorn snails are often sold in pet stores or on the Internet as additions to aquariums or ponds.
- Transmission by animals: Animals such as birds, pond fish, frogs and newts can transfer posthorn snails from one body of water to another. For example, if a bird eats a posthorn snail and then lands in the pond and its droppings end up in the water.
- Transmission by aquatic plants: If you put aquatic plants in the pond, you may find small posthorn snails on the plants, which may end up in the pond.
- Natural colonization: In some cases, posthorn snails may naturally colonize the pond, such as if there is a connection to a nearby pond where the snails already occur.
Important to know
It is important to know that not all snails are suitable for a pond. Some species can even damage the pond and the plants in it. However, the posthorn snail is generally a useful and harmless inhabitant for any type of pond.
Oxygen plants make water attractive to posthorn snails
Oxygen plants provide the water in the pond with oxygen, therefore the posthorn snails will feel very much at home in a pond with enough oxygen plants. For this reason, always choose pond plants when you want life in the pond. - Simon
Shop our oxygen plants delivered directly from our own nursery
What do posthorn snails eat?
The posthorn snail eats everything, including soft living aquatic plants and wilted parts of aquatic plants, so the little snail keeps the plants in your pond beautiful. But the thing that often appeals most to people with a pond is that the snail eats algae from the bottom of the pond. With this, the posthorn snail keeps your pond water clear and the water values stable!
Where does the posthorn snail live?
The posthorn snail is a freshwater snail found in still or slow-flowing waters in Europe. They can adapt to different water types, from acidic to calcareous water, but they prefer water with good water values and high oxygen concentration. Ponds with lots of oxygen plants are thus favored. Posthorn snails live on the bottom of the water and feed on algae and other small organisms, such as small water fleas. They are often found in large numbers together, especially near aquatic plants and other objects on which they can climb and feed. Posthorn snails are important as a food source for various animals, such as toads, fish and waterfowl. They also play an important role as cleaners of organic waste in the water, such as dead plants and leaves. This helps maintain a healthy ecosystem in the water in which they live.
Frequently asked questions about the posthorn snail
A posthorn snail can grow up to 5 cm in size
The lifespan of a posthorn snail depends on several factors, including the environment, diet and presence of predators. Generally, the posthorn snail lives between 1 and 2 years, but some individuals can live up to 3 years. As the posthorn snail ages, the shell may slowly wear down or become damaged, which can lead to weakening and a shorter lifespan.
Simon van der Velde
Pond specialist and aquatic plant grower since 1986
Simon's vision is to let nature do its work in your pond. No need to buy all kinds of measuring equipment and water improvers. If the fish are swimming nicely and the plants are growing well, then the water in the pond is of good quality. With a good planting plan and the right approach, you can save a lot of money and maintenance, and ensure a clear, biologically balanced pond that becomes more beautiful every year.