Quote:
	
	
		| 
					Originally Posted by ALang  I checked mine: 4" across the neck. (NAC 7). | 
	
 Can you please check what is the height of the rising tube from bubble diffuser plate to the bottom of the collection cup neck?
I am considering this skimmer and would like to know what is the size of the mixing chamber.
Also what is the diameter just above bubble diffuser?
There is a new skimmer on the block 
2011 Marine color CPS-150 that is very similar to NAC7 but they changed a water effluent tube, made it few inches  higher which will make it more consistent in regards to a water level and more stable. looks very similar to a
 HERO line skimmers.
Thank you so much.