Hi Kissman,
my english is not so good, but i hope i translated correctly.
My corals had 4 weeks ago the same pale colour like yours from post 316. Is it right that mostly all corals with green colors have this Problems? The other corals are pale but not so bad like the green?
My Acro tricolor for example lost all the brown color and looks like zeovith corals.
Most of my green Acros were pale and beige. Most SPS have no Polype expansion and my LPS have small polyps.
Growth was very bad all the time.
More fish feeding and coral feeding has brought little.
I think the Problem ist not a limitation from organic materials like po4 or no3.
The Problem is an iron limitation.
No plant or seaweed cant live or growth without iron. And corals are the same.
Iron falls off very quickly in our tanks.
You can feed your corals with phytoplankton or dose iron with trace elements.
Now i dose trace elements with more iron and my corals looks better and gets the green colour back slowly. Some corals gets new growth tips.
http://www.advancedaquarist.com/2002/10/chemistry
i hope i can help you, regards form Germany
Reiser