Click on “ELASTIC CLUSTERS” drop down to go to the EC you wish to add container pools to. You will see the EC details page. Click on “CONTAINER POOLS” tab. You will be taken to the container pools details page. Click on “ADD CONTAINER POOL”.
This will take you to “ADD CONTAINER POOLS” page. Fill in the details about the container pool, and hit CONFIRM.
You should see a progress indicator as the container pool is being added and "Done" when finished.