I think this is the right place for these im not sure on the name. THey are some type of leather coral. A friend of mine lost his house and was in a hurry to tear his tank down and gave me a bunch of stuff
here are some pics:
http://i928.photobucket.com/albums/a...0/101_0054.jpg
http://i928.photobucket.com/albums/a...0/101_0053.jpg
THanks,
Eric