I have made a few backgrounds. here are two methods i did. one is with fibreglass.. the pother is with cemt/styro/ect...
http://www.monsterfishkeepers.com/forums/showthread.php?t=211530&highlight=background
http://www.monsterfishkeepers.com/forums/showthread.php?t=167076&highlight=background
http://www.monsterfishkeepers.com/forums/showthread.php?t=211530&highlight=background
http://www.monsterfishkeepers.com/forums/showthread.php?t=167076&highlight=background
