What kind of snails?

[Jo7984]

Are these 2 different types of snail??

The big one is about 1cm and the others are much smaller.
Their shells look different bit it's hard to get pics.
I usually pull out the tiny ones from my aquarium so the bigger darker one is the largest I have ever found!

 

[Avila]

The big one looks like a bladder snail. They are PROLIFIC breeders in freshwater. I'm not sure about the smaller snails though.

 

[Demeter]

The little ones are baby ramshorns snails.

 

[Jo7984]

Thanks for replying.

Neither of the snails were introduced to aquarium on purpose. I take any out as soon as I spot them.

That big one is the biggest one I have seen so far and I am assuming there will probably be eggs in there by the size of it

Will have a google now I have a name for them though.

Thanks

 

[Fisch]

Thanks for replying.

Neither of the snails were introduced to aquarium on purpose. I take any out as soon as I spot them.

That big one is the biggest one I have seen so far and I am assuming there will probably be eggs in there by the size of it

Will have a google now I have a name for them though.

Thanks

They don't need to be as big to reproduce.
The big one escaped your view since some time. I believe nobody introduces these snails on purpose, they are normally hitchhiking on plants in the egg stage.
I do not see a Ramshorn to be honest, but the angle of the picture makes it hard to determine.