What is this interesting thing?

[nano_reez]

I'm not sure what this is but it has been getting larger

 

[twilliard]

Vermatid snail :-)

 

[twilliard]

The spiral shape and color gives it away :-)

 

[nano_reez]

So I should get rid of this thing right?

 

[twilliard]

So I should get rid of this thing right?

Up to you.
They feed off of suspended foods.
If you do want to get rid of it just take superglue and cover it.