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  #1  
Old 01/08/2008, 09:17 PM
kware kware is offline
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magnesium to calcium question

Why does the amout of dissolved magnesium relate to how much calcium can be dissolved? Am I right when I say you have to have magnesium to have calcium?
  #2  
Old 01/08/2008, 09:24 PM
bertoni bertoni is offline
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This article might help:

http://www.advancedaquarist.com/2002/3/chemistry#h5

Magnesium helps by increasing the solubility of calcium carbonate and by poisoning the surface of calcium carbonate crystals, which make further precipitation more difficult. Phosphate can do this poisoning, as well, I believe.
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  #3  
Old 01/08/2008, 09:34 PM
kware kware is offline
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thanks bertoni
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Old 01/08/2008, 09:48 PM
bertoni bertoni is offline
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You're welcome! There's more reading available, if you want more details.
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  #5  
Old 01/08/2008, 10:25 PM
kware kware is offline
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Thanks again.
  #6  
Old 01/08/2008, 11:58 PM
bertoni bertoni is offline
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This article discusses precipitation in more detail:

http://www.reefkeeping.com/issues/20...f/index.php#12
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  #7  
Old 01/09/2008, 12:59 AM
capn_hylinur capn_hylinur is offline
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specifically you should have a mag level of 1300ppm to maintain calcium levels at 400
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