Those are the coolest doors I have ever seen on a stand, nicely done bud! 
 
Test you calcium and alk at the same time and see where it is, adjust accordingly and as for mag, I usually just bump mine from 1100 to 1350 without any issues but you can go slow if you like. 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
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