Fluid Interface

The fluid interface will show you all the fluids within your ME system, you can take out liquid by putting a bucket in the bottom left slot and then selecting a liquid. You can put liquids back in by putting the bucket in the left slot and selecting the correct liquid. If you put a bucket of a liquid you do not have in your system it will add it on its own.

The interface on normal ME chests will change to a fluid interface when using fluid cells.