Quote Originally Posted by Francesco
The main compartment of the tube is made about 1 or 1.5 inches higher than the film's top edge when fully inserted (film is inserted long side vertical). This would allow one to fill the tube with developer and have the film lying about half and inch or so below the water level. Screw on the tube cap and start the development procedures accordingly.
What kind of "tubes" are we talking about here? Something other than a JOBO drum, it appears.