I`ve been fighting the dino for years now and recently I finally got it beat. 
I`ll tell you what worked for me and what didn`t. 
 
What didn't work ! 
 
3 Day black out; it worked but if you don`t solve the underlying problem it`ll just come back (I lost a few corals due to the stress too!) 
 
Raising PH; I didn't see any difference.  
 
GFO; It didn't make much of a difference for me but I still recommend its use in general. 
 
No water changes; Didn`t work in my experience 
 
 
What worked! 
Carbon; This made a big difference in my experience!   Lots and Lots at least 1 Cup per 50G. The more the better. 
 
Changing RO Membrane; I believe this was the main problem. If your not getting 0 TDS then your going to have Algae problems.  
 
Good Husbandry in general. 
 
What may also help for you is using a diatom filter and running some silicate absorbing media through a reactor.  
 
If you feed frozen foods you should rinse them before adding to tank.  
 
Good luck 
		
	
		
		
		
		
		
	
		
		
	
	
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