here is a pic to show how thick the substrate is http://i1301.photobucket.com/albums/...ps8a00757f.jpg

here is left side of tank http://i1301.photobucket.com/albums/...ps5bca0e39.jpg

she likes to do this all night: http://i1301.photobucket.com/albums/...psa0b6a7b7.jpg