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Old 10-31-2014, 04:14 PM   #1
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Magnesium Sulfate or Chloride?

Hi all,

Looking at bulk reef supply magnesium and am trying to decide which to buy. What's the difference between the two?

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Old 10-31-2014, 08:59 PM   #2
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Although I cannot answer your question, I would absolutely avoid adding sulphur to any tank with a DSB. H2S gas can be produced in the anerobic bacteria areas.
If you don't have a DSB then don't worry about that factor. It's a non-issue.


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Old 11-01-2014, 07:24 PM   #3
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Sulfur and chlorine are neither good for your tank. You can get pure magnesium from your lfs.
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Old 11-01-2014, 08:37 PM   #4
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Quote:
Originally Posted by jeffaquarius View Post
Sulfur and chlorine are neither good for your tank. You can get pure magnesium from your lfs.
What supplement are you referring to? I've never seen a "pure magnesium" supplement that wasn't bound with either chloride or sulfate.
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Old 11-01-2014, 11:47 PM   #5
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Brightwell Aquatics Magnesion-P - Dry Magnesium Supplement for Reef Aquaria 300g / 10.6oz
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Old 11-01-2014, 11:50 PM   #6
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It says right in the ingredients that it's made from a blend of magnesium chloride and magnesium sulfate.
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Old 11-01-2014, 11:54 PM   #7
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Their ad is misleading then since it says at the bottom
"Nearly all Brightwell Aquatics products are over 99.9% pure."
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Old 11-02-2014, 12:07 AM   #8
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Yes... 99% pure magnesium sulfate and magnesium chloride.

http://brightwellaquatics.com/products/magnesionpt.php

Directly on the website it states the ingredients are: Magnesium chloride and Magnesium sulfate. Their statement of "pure" means there are no contaminants in their mixture. I.e. those are the only 2 things in that bottle.
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