I have a tunze 9005 skimmer that is producing about 150-200 ml of skimmate a day.  the skimmate is REALLY DARK and odorous (when I smell it).  Is this a good amount for a 90 gallon tank.  My bioload is pretty low right now.  3 fish small CUC and about 10 various corals.  I am wondering if I have it set up and running effectively like it should?  This is my first skimmer since I came from a 12 gallon all in one so I have no experience with them.
				
			
				