I.D. please

[slinkyslink]

I've had this in my tank for a while now it came in a piece of LR and it hasn't changed.
http://www.chatevo.com/forums/attachment.php?attachmentid=9220&stc=1&d=1169416543

[Blue]

Looks like a sponge to me :confused:

[jonie]

yep, my orignal thoughts, but not too sure myself,the spikey tube like things turn me off though

[Paul P.]

looks like a sponge to me too