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Do I need to provide indoor shelter for my pond snails? | Decorative Ponds & Water Gardens Q & A

Do I need to provide indoor shelter for my pond snails?

Q: Do I need to provide indoor shelter for my pond snails?

Jerry – Kernersville, NC

A: Scientists have identified an estimated 4,000 species of freshwater snails, but one that you might find inhabiting your backyard pond or water garden is the Japanese Trapdoor Pond Snail, also known by its scientific name Viviparis malleatus.

These algae-eating gastropods have extra-special shells with a hinged fingernail-like plate that allows them to seal the shell’s opening, providing protection from drought and predation—hence their “Trapdoor Snail” nickname.

Though these hearty snails overwinter well in harsher northern climates, they do require some attention when temperatures dip. Here’s what you need to know:

  • Cool with Cold-Temperatures: These snails really do well in colder temperatures—in fact, some experts say they’ll do fine in sub-freezing weather, even down to 0 degrees Fahrenheit. When it gets really frigid, they’ll dive to the bottom of the pond, where the water is warmer.
  • Adequate Pond Depth Required: In order for them to be happy and healthy through those chilly winter spells, the snails need the water in your pond’s depth to ideally be 20 to 30 inches. Down there, they’ll happily groom the bottom of your pond, gobbling all the decaying matter like leaves, excess fish food and fish waste.
  • No Habitat Required: Because these little guys carry their homes on their back, you don’t need to provide shelter or food for them. If they feel endangered, they’ll disappear into their shells; if they’re hungry, they’ll nibble on algae that’s on your plants, underwater pots, rocks and walls.
  • Aeration Appreciated: Like any aquatic critter, Trapdoor Snails appreciate oxygen-rich water, and that’s where a subsurface aeration system, like the Pond Logic® PondAir™ Aeration Kit, will help. An adjustable unit like this will infuse your pond with oxygen while remaining whisper quiet.

If you have other types of snails in your pond or water garden, these rules may not apply—so be sure to learn their care requirements as they may need more attention than these hearty Trapdoor Snails.

Pond Talk: Do you have other types of snails in your pond? If so, what kind of care do they require?

Eliminate Harmful Gases - Pond Logic® PondAir™ Aeration Kits

Can my snails stay in my pond for the winter? | Decorative Ponds & Water Gardens Q & A

When should I remove the fountain from my pond?

Can my snails stay in my pond for the winter?
Cody – Falling Spring, VA

While your fish and some of your aquatic plants remain safe and sound during their winter dormancy you may wonder if your snails will be as successful. Your pond snails are amazingly resilient in cold weather and will do just fine given their habitat is suitable.

Your pond depth will play a major role in the success of all of the living creatures in your pond. Your plants, fish and snails can survive in cold water but they won’t fair too well if frozen into a solid block of ice. The ice that forms on the top of your pond varies in thickness depending on where you live but the general rule of thumb is to build your pond to be around 20”-30” in depth. This ensures there is an ample layer of water at the bottom of the pond that is left unexposed to the elements which will provide a safe haven for all of your pets and plants.

You won’t have to worry too much about your snails finding a safe place to hide over the winter as they come equipped with a strong shell which provides adequate shelter. They can hide amongst the rocks and plant remains in the pond as well during the winter but as your fish are in dormancy there is not an overwhelming need for additional habitat. As water temperatures drop and bacteria begin to dwindle a lot of pond owners tend to rely on algaecides to keep their ponds free from algae. If you are using an algaecide in your water garden review the product label thoroughly to ensure it is safe to use with your snails. When your pond comes back to life in the spring your snails will flourish amongst the new plant growth.

Pond Talk: Do you do anything special to provide safety for your snails in the winter?

Aquatic Plants – Decorative Ponds & Water Gardens Q & A

Pink Water Lily

Get Ready to Soil Your Plants
Owning a small pond is not just about pumps, filters, and fish. Pond guys and gals everywhere are exercising their green thumbs by implementing aquatic plants into their water feature.

Go Green or Go Home
Aquatic plants are an excellent addition to your pond as they add life to your water garden with their diverse shapes and colors. In addition to their obvious visual appeal, plants also feed off of available nutrients in your water garden which decreases the amount of food available for potential algae blooms. Furthermore, aquatic plants provide food for your fish population as well as places to spawn and hide.

Plethora of Plants
You may love the idea of incorporating plants into your water garden, but there are so many types to choose from it may feel a bit overwhelming. If you are still a bit fresh in the water gardening scene, or you just don’t know that much about aquatic plants, you can find solace in an Aquatic Plant Package. Getting great plants for your water garden is as simple as choosing a plant package that fits the square footage of your pond. Packages also include Black Japanese Trapdoor Snails, which are great for eating algae without taking over your entire water garden. More adventurous water garden owners can purchase aquatic plants à la carte to add even more diversity to their pond. Mixing a variety of plants will make for a more interesting landscape and will help promote a balanced ecosystem as each plant has its own unique attributes.

Click over to our Planting Aquatic Plants article to read more about aquatic plant selections and how to plant them.

POND TALK: What type of plant selection can be found in your water garden? Which plant is a MUST have?

Aquatic Plant Packages

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