Snail identification in new aquarium

[Rbunebula]

I have been cycling my tank for 5 days, and I found this little guy inside. Can anyone help me identify what kind of snail it is, or if it even is a snail?

 

[ADsnail]

Hard to tell from far away. Could you try to catch it for a closer pic? With your fingers, or a net, or a spoon? And what does it do when you try to catch it for that picture - if it tries to make a quick getaway it's definitely not a snail. If it sits like a bump and lets you pry it off the side you probably have a snail there.

 

[Autumnsky]

Bladder snail Physidae Acuta, most likely if the antennae are thin and basically even shaped base to end, Pond snails Lymnaea stagnalis, antennae are more shaped like a triangle at the base.