hi guys!  i just registered in order to post in your thread.  its an amazing tank.  
just have a quick question....why don't you use ozone to clarify the water?  its not difficult to have crystal clear water, even for such an incredibly huge tank.  i don't know the first thing about freshwater, since i just keep a marine tank.  but i do use ozone and an orp controller, and it has made my tank water invisible.
thanks!