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			 i'm having problems keeping my calcuim levels up in my tank,looking for advise. 
		
	
		
		
		
		
			i have a big toad stool that i am guessing it is absorbing most of it.i thought of trying magnesium but don't know,please help 
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	150gal,27gal sump,2-150 watt mh,2-atinics,2-10000k, 8watt moon,skimmer,rena xp3,80lbs live sand,180lbs live rock,sps,ribbon eel,tomato clown,chocolate chip star, sea hare,cowfish,birdmouthwrasse,longnosehawk  
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			#2  
			
			
			
			
			
		 
		
		
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			 what is your alkalinity at....if your alk is low it will pull your calcium low!!(I think) 
		
	
		
		
		
		
			
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	500G Mixed Reef ![]() __________________________________ Electrician, Electronics Technician, I can help with any electrical questions you might have!! __________________________________ Kevin  | 
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			#3  
			
			
			
			
			
		 
		
		
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			 Your toadstool is not absorbing your calcium.  While they may use a very little bit it is doubtful.  Calcium is abosorbed by calcifiying creatures such as Clams, Small Polyp Stoney corals(SPS), and to a somewhat lesser degree by Large Polyp Stoney corals (LPS).  There are others but those are your big users of calcium.  You need to have calcium, alk./hardness, and magnesium in balance.  I try to maintain mine at close to natural sea water if I can so Calcium at 400ppm, alk/hardness at 8dkh, and magnesium at 1350-1400. 
		
	
		
		
		
		
		
	
		
		
	
	
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