4x50lbs pool filter worked for my 180gal. Round smooth river rocks, a nice center piece drift wood, and some to none plants.
http://www.monsterfishkeepers.com/forums/showthread.php?t=188002
here are some exsamples of great looking set ups.
http://www.monsterfishkeepers.com/forums/showthread.php?t=188002
here are some exsamples of great looking set ups.