Japanese Trapdoor Pond Snails

(51 reviews) Write a Review
Minimum Purchase:
10 units
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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


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  • 5
    trapdoor snails

    Posted by JACK DAVIS on Oct 23rd 2019

    Snails got here in great condition. Three days later, I saw all ten snails cruising my 1200 gallon pond last night. Thanks again..

  • 4
    Japanese trapdoor snails

    Posted by Miranda George on Jul 23rd 2019

    I am wondering why the snails - who do such fine work-have such short lives? Why do I have to buy 40 snails two or three times a season?

  • 5
    As advertised

    Posted by Carol DeLater on Jun 27th 2019

    Arrived in excellent condition and alive. Prior to ordering I called and talked about them and received knowledgeable information and all my questions were answered. Highly recommend LilyBlooms

  • 4
    trap door snails

    Posted by john hotmer on Jun 20th 2019

    i ordered 10 snails and was satisfied with the size and fast shipping. was a little disappointed i had 9 snails and 1 empty shell.

  • 5

    Posted by Wigglelegfrog on Jun 12th 2019

    I have a little way of knowing how well these snails will actually do toward cleaning off all my algae; however, I CAN say that since I introduced them to my pond a week ago, they have been all over it, eating algae like crazy. I do not yet see a difference, but I have a lot of algae. I ordered 25 snails from LilyBlooms, and like others have stated in their reviews, I received extras; in my case three extra. Within a few hours, all but a couple of them had moved considerable distance from where I originally placed them in the shallower water on the smooth river rocks, slightly submerged, and in the afternoon shade.. It took a couple of days before I could confirm the other two were alive. Three of the snails I received were smaller, about an inch or less in diameter (possibly the ones that were thrown in as extras.) Twenty five were large, 1 1/4” - 2” in size. Shipping was surprisingly fast, as I received my order within three days. So, now, all twenty five are making their way around my 500 gallon pond. Snail watching is fun, and I am looking forward to a pond with much less algae!

  • 5
    All snails were alive when they arrived, well packaged, and a few extras included

    Posted by Lorie McCarty on Jun 6th 2019

    First time buyer and I was extremely pleased with service and quality of products sent to me.

  • 5
    Japanese trapdoor snails

    Posted by Miranda George on May 27th 2019

    These amazing snails have cleaned up the water in my pond in less than a week. I am very grateful to them and would willingly give them a tip but all they want is algae.

  • 5
    Japanese trap door snsils

    Posted by Bob on May 27th 2019

    Snails arrived quickly, alive and well. Good size and a good price.

  • 4

    Posted by Pepper Morris on May 21st 2019

    I recieved 12 and 6 had a lot of moss on them. Doesn't seem to matter. All 13 from last year died out. All the 100 babies I took out of the upper pond, I put them in a basement 55 gal aquarium. They lasted 2 months then died. 72 degree water temp and 10 pond gold fish. All fish are doing great. Don't know why snails died.