It's an open cell foamy kind of stuff. here is a link.
http://www.guttersupply.com/p-LeafDefier.gstml
Used to keep leaved and debris out of gutters my local ACE has it for $15 for a 4 foot piece. I was thinking of cutting it up in pieces and using it as a biomedia.
http://www.guttersupply.com/p-LeafDefier.gstml
Used to keep leaved and debris out of gutters my local ACE has it for $15 for a 4 foot piece. I was thinking of cutting it up in pieces and using it as a biomedia.