What snails are these

Can you tell me what these snails are and how big they might grow?

 

They look like ramshorns. The biggest I found was dime-sized.

 

I agree with ramshorn snail. Some people like them and some consider them pest snails, just because they can make a lot of babies. Alison

 

looks like ramshorns. they do not get big as far as I know of, maybe just about dime- sized.

 

It looks like Segmentina nitida, a minute snail from the same genus as other ramshorn snails. They hold their shell parallel to the glass surface they crawl on, unlike most other ramshorn snails who's shell is perpendicular to the glass.

 

Anyone knows if it's good pea puffers food?

 

Should be good puffer food, but only know from reading, not personal experience.