I don't know your total load Dom so can't say myself, but with that volume of water I'd say you could go with the standard 'a bunch' and watch the params for 3-5 days. Then if all is good after 2 weeks do another 'bunch'. 
 
Or you could just toss 'em all in at once and spend the next month testing the primary 3, major WCs/dosing MB7 etc. 
Depends on how much time you want to spend controlling NH3 and so on. And as I said I don't know your current load awaiting release. 
 
A plus to adding everyone at once will of course be the lessening of squabbles. 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
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