Wow, I just went through this entire thread. Great job on the build. Hopefully one day I will be blessed to have a tank like this. Have you done anything new with the bedroom?
What is the big yellow platting coral in the pics? I think it was the third one down.
Came across this article this morning: http://www.advancedaquarist.com/2012/3/chemistry
After our discussion on Phophates, I figured you'd be interested.