it is 2 large buckets, one with the media in it ( the bottom )
and one that is a reservoir ( the top ) and spigot and hose that connects the two.
the small one ( 3.5 gallons ) can handle 400 gallons of wash water and spent fix
( works with low concentrations of silver )
working with the silver magnet, it can handle 1000 gallons of wash water and de-silvered fix.