Canon BJC 3000 Reference Manual page 150

Replacing the Ink Tanks
2
To remove the empty ink tank, press in on the tab on the ink tank to release
and pull it out of the slot.
Do not remove the BJ Cartridge! Leave the BJ Cartridge installed in the
printer and remove only the ink tank(s).
Fix tab
Discard empty ink tanks according to the local laws and regulations regard-
Note
ing disposal of consumables.
Important
To avoid staining your hands, clothing, or areas of the work site, do not
shake or drop ink tanks when you are handling them.
Routine Maintenance 150