With living soil, you will still need to top dress a time or two. You should also add some teas to it - I do mine roughly 1x per week.
Not sure how much experience you have with living soil/organic growing so I don't want to give info that you already have/know, but I made the mistake of not adding anything but water with my first organic grow and it was less than optimal. Check out Earth Dust - I've been using that and it's gotten me amazing results!