The Aspire ETS BVC has a 2ml liquid capacity.

How to fill the Aspire ET-S Clearomizer: 
1. Make sure the clearomizer is detached from the battery.
2. Turn the clearomizer upside-down, so that the mouthpiece is pointing towards the floor.
3. Unscrew the base of the clearomizer (the part that screws into the battery).
4. Fill your liquid into the tank, making sure to pour it in from the side, so that the liquid is cascading down the sides of the tank walls. make sure not to get any liquid into the center airflow hole.
5. Screw the base back onto the clearomizer body. Let the tank stand for 5 minutes,
6. Screw the clearomizer onto your battery.

How to fit / exchange coil
1. Make sure the clearomizer is detached from the battery.
2. Turn the clearomizer upside-down, so that the mouthpiece is pointing towards the floor.
3. Unscrew the base of the clearomizer (the part that screws into the battery).
4. Unscrew the coil from the base and fit new. Screw the coil tightly all the way in (a loose coil will cause the clearomizer to leak from airflow)
5. Now is the time to fill the tank with liquid.
6. Screw the base with new coil back onto the clearomizer body.
6. Screw the clearomizer onto your battery.