What is this thing??

[tubz]

I find these in my filter sock when i clean it. This is the biggest I've seen one yet. They seem to go crazy when I turn the sock inside out and they are out of the water. Any ideas what this is?

 

[little_fish]

looks like a pod, good guy! I would add them back to the tank

 

[tubz]

They get that big? Living conditions must be good in the sock.

 

[little_fish]

lots of food