Due to an unusually high volume of orders, we are selling out of many of our plants and experiencing some shipping delays. For more information see our blog post: Lilyblooms.com/blog

Japanese Trapdoor Pond Snails

(75 reviews) Write a Review
Minimum Purchase:
10 units
Bulk Pricing:
Buy in bulk and save

Product Overview

Black Japanese Trapdoor Snails (Viviparis malleatus)

The Black Japanese Trapdoor Snails (Viviparis malleatus) are the preferred snail species for pond owners and water gardeners. Japanese Trapdoor Snails are one of the few varieties that will survive in northern climates. Pond snails are helpful in keeping algae under control in your pond as they groom your plant containers, rocks, liner sides and plants. Trapdoor snails will consume excess fish food, fish waste and decaying leaves from the bottom of the pond. Japanese Trapdoor Snails are live-bearing and only breed twice a year. They will not over reproduce and become a nuisance like egg laying snails. To have a positive effect on algae growth, a minimum of 10 snails per 50 square feet is necessary. Large natural ponds would require at least 200 snails per acre to be effective.

Minimum order of 10


(75 reviews) Write a Review

75 Reviews Hide Reviews Show Reviews

  • 5

    Posted by JP on Apr 12th 2021

    Came in alive and seem to be in good health.

  • 5

    Posted by Anthony J Tassone on Mar 30th 2021

    They arrived alive and very quickly. Very please.

  • 5
    Went right to work!

    Posted by Sarah on Mar 2nd 2021

    We ordered the Japanese trapdoor snails to clean the algae in our pond and large outdoor aquarium. Within a few hours of placing them in the pond and aquarium, they went to work cleaning. A week later we can see a noticeable improvement.

  • 4
    Trapdoor Snails

    Posted by Bob McCarthy on Nov 12th 2020

    Snails are large and were delivered within a few days. All arrived alive with exception of 4 floaters, that's the reason for 4 stars. Excellent service!!

  • 5
    Great Service

    Posted by Susan on Oct 14th 2020

    The snails showed up on time, wrapped in wet newspaper. I followed the instructions to introduce then to my pond. Everyone of them survived are eating away. Thanks

  • 5
    Japanese Trapdoor snails

    Posted by Lee on Sep 15th 2020

    As soon as we put them in our koi pond they went right to work- each day progress is made destroying algae. Wonderful

  • 5

    Posted by Tony Mallory jr. on Jul 2nd 2020

    excellent way to keep pond cleaned naturally. Recommend draining and cleaning pond though if it's very dirty. We had to do so after two weeks of no results; pond has been clear for nearly three weeks now in 90 plus weather and no filters on koi pond, just got water features and aerator.

  • 3

    Posted by Chloe Johnson on Jun 16th 2020

    The size and amount of the snails were great, however the box was torn, smashed and had been tapped up. One side of the package of snails was smashed. (I think 3-4 snails) the rest were fine. I have not seen any evidence the them opening up yet as my pond has many hiding places.

  • 1
    Don’t buy!!

    Posted by Unknown on Jun 16th 2020

    My pond was crystal clear until these were put in. They arrived late, took over a week to wake up, were covered in green and now my pond has not been clear since. Very disappointed I wasted my $. In fact I’ve fished out as many as I could find and tossed them in the ditch.