![]()  | 
	
		
			
  | 
||||||||
| Portal | PhotoPost Gallery | Register | Blogs | FAQ | Members List | Calendar | Search | Today's Posts | Mark Forums Read | 
| 
		 | 
	Thread Tools | Display Modes | 
| 
		 
			 
			#3  
			
			
			
			
			
		 
		
		
	 | 
|||||
		
		
  | 
|||||
| 
	
	
		
			
			 It's possible that he was measuring "general hardness" rather than "carbonate hardness". The latter is generally  unaffected by Mg levels, but the former is definitely affected, since the Mg:Ca ratio in sea water is usually 3:1.     
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
	Having a high Mg level helps you maintain a high calcium level, by the way.  | 
| Thread Tools | |
| Display Modes | |
		
  | 
	
		
  |