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Old 04-02-2013, 06:26 PM   #1
raRE EFfects
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What does magnesium do?


just wondering, what does magnesium do in a reef tank in relation to corals? does it help improve the structure, colour, or what?

Thanks
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Old 04-02-2013, 08:06 PM   #2
ska d
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Good question. I've read up on it, but its not something I could explain easily. It definitely has some effect on how corals use calcium to create skeletons. Look up Advanced Aquarist, Randy Holmes Farley under chemistry and you should find all kinds of info. I would think just studying mag won't be that useful, but how it relates tocalcium and alk is something we all need to know.
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Old 04-02-2013, 08:24 PM   #3
fishopatamus
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Hard corals, with 'stone like' skeletons, use calcium carbonate (CO2) to build their skeletons, however they also use other trace elements including magnesium, strontium, and iodine (i think?) in this process. For proper growth and health of your corals you need magnesium present in your water column at about 1250 to 1350 ppm.
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Old 04-02-2013, 09:20 PM   #4
wakesnow61784
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http://reefkeeping.com/issues/2006-06/rhf/index.php

Good luck understanding it. It basically helps prevent calcium from solidifying, which allows more to remain dissolved in the water.
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Old 04-03-2013, 10:53 AM   #5
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It helps to keep Alk and Calcium in balance
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Old 04-03-2013, 11:17 AM   #6
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Its an enabler mineral. It allows higher than normal (normal being what the solution can support) amounts of Ca++ (calcium) and C03-- (carbonate).

In short. if this value is to low (<1200ppm) you will have a tough time keeping proper concentrations of Ca and Alkalinity.

If this value is to high (>1500ppm)it may cause issues with stony growth but is not what I would call toxic. its also used to control certain types of algae at high levels.
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Old 04-03-2013, 11:20 AM   #7
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It makes you sound nerdier when you are talking about your tank.
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Old 04-03-2013, 06:50 PM   #8
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ahahah thanks guys!
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