Strange Thing In My Filter Chamber? Id Needed

[simonas]

Its white and spongey and circular about 1 inch across. It has one tube that sticks out of it

heres the pics?

any ideas what it is?

simon

 

[-Nemo-]

Kinda just looks like a sponge to me

 

[ben1987]

yep, id say sponge too.

 

[bae1994]

yep sponge