Nice NC - particularly like the rockwork. I would strongly caution against adding any more fish - the bioload from your fish may cause much additional maintenance. I also recommend bringing back the flowerpot (
Gonipora sp, possibly
G. polyformis or
G. stokesi) for a refund or trade-in. They are not
impossible to keep providing they are healthy when purchased - which yours looks, but it seems to be the red species that do better long term. Here is a great article on Goni care and culture - its a good read and will give you a heads-up on what you just got yourself in for
. Best of luck.
http://www.advancedaquarist.com/2005/10/aafeature2