The Nano Cube cycled nicely – complete with measurable ammonia and nitrite spikes – and stabilized in just over a week, though it did require some addition of pH buffer to raise the pH.  After the water tested out great at the local fish store, we purchased one dozen blue legged hermit crabs, a green mushroom coral and a branching hammer coral.  The hammer coral opened up nicely this evening and my daughter is digging the hermit crabs.  After the current live stock sit for a while and we’re comfortable managing the tank, I think a brittle star is next on the list.