How big can snails get?

All other fresh water inverts such as snails, crab & crayfish discussed here.
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How big can snails get?

Postby maiisiku » Thu May 20, 2010 11:20 pm

I have quite a few snails that were pin head size that came in on plants. I felt a bit mean getting rid of all of them so I let a few stay. Now I have one thats the size of a 20p coin. How big can they get? They are brown and have cone shaped shells. I have them in both tanks and they do eat the algea and help keep the plants clean and they are living things so I would feel bad if I took them out of there incase they died!
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Postby willyf87 » Fri May 21, 2010 5:03 pm

They sound like pond snails to me, if that is them they breed very quickly and could over run your tank, with that said they shouldn't do any damage and will probably end up cleaning up your tank. Some fish will eat them if you want to control there numbers but it depends what fish you have, puffers and loaches are good snail eaters, it sounds like your one is quite big!! If they are pond/tadpole snails I don't think they would get much bigger than that, normally about a 1cm.

Hope that helps

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Postby comp.wiz » Fri May 28, 2010 3:37 pm

Just to note Pond and Tadpole/Bladder Snails are different (Pond- Lymnaea stagnalis, Tadpole- Physa acuta), with the latter usually more common in aquaria.

But yeah, they can reach 2cm, but not usually much bigger, and most of them stay smaller. I always think its beneficial to have some 'pest' snails in the aquarium, as long as they dont over-run it.
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