If you truly had brooklynella then a 6 - 8 week fallow period would be sufficient. But to go fallow, you would have to take your current fish out and put them into quarantine. 
 
Alternatively, wait the full 3 months and see how your current fish do. Then while you are waiting, quarantine any new fish that you buy. 
 
Best of luck. 
		
	
		
		
		
		
		
	
		
		
	
	
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