I have 2 quicksand fluidized bed biofilters
the first one is a QSA-1: it has 65 square feet of usable surface area. good for a 120 gallon tank. may need some new sand (link below sells it) sold new for $107. asking $60 + shipping http://www.dotphoto.com/MemViewAlbum...1881468&Page=2
the second...