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| General Reef Discussion In this forum we discuss issues related to keeping marine and reef aquariums in a friendly flame-free environment. |
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06-19-2007, 11:53 AM
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#1
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Clowns Galore!
Join Date: Oct 2005
Location: Sedalia, Mo
Posts: 5,939
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Finally Checked My Magnesium Level
I bought a Salifert Mg kit on my recent trip to Chicago. Since I had never checked it before I really had no idea where it would be.
I am reading 1230.
I know it needs to be between 1300 and 1500.
What is the best way to get it up there?
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06-19-2007, 12:33 PM
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#2
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Professor Chaos
Join Date: Apr 2005
Location: Arkham Asylum
Posts: 10,096
Reviews: 12
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I have never checked it... never had a Mg related issue.
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06-19-2007, 12:38 PM
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#3
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Just some guy, you know?
Join Date: Sep 2005
Location: Phoenix, AZ
Posts: 18,936
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Mg should be 3X CA,. so if your CA is 420 your MG should be 1260,.. yes I used a caculator for that.
I use Magflake to raise MG, but allot of people use Kent MG and I've used it in the past without issue,..
Whiskey
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Vagabond
Computers are the worlds most plentiful source of unique, and unimaginable problems.
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06-19-2007, 01:03 PM
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#4
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Clowns Galore!
Join Date: Oct 2005
Location: Sedalia, Mo
Posts: 5,939
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Quote:
Originally Posted by Wiskey
Mg should be 3X CA,. so if your CA is 420 your MG should be 1260,.. yes I used a caculator for that.
I use Magflake to raise MG, but allot of people use Kent MG and I've used it in the past without issue,..
Whiskey
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Ca is sitting at 400. Not too bad then.
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06-19-2007, 01:11 PM
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#5
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Big Fishy
Join Date: Jan 2007
Location: Orange County, California
Posts: 639
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Quote:
Originally Posted by Wiskey
Mg should be 3X CA,. so if your CA is 420 your MG should be 1260,.. yes I used a caculator for that.
I use Magflake to raise MG, but allot of people use Kent MG and I've used it in the past without issue,..
Whiskey
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Sorry to hyjack the thread, but why did people here tell me that my magnesium had to be 1350? My calcium is 400, so the MG should be fine at 1200, right?
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06-19-2007, 01:13 PM
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#6
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Shark
Join Date: Aug 2006
Location: san jose, ca
Posts: 1,477
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Quote:
Originally Posted by NewFishGirl
Sorry to hyjack the thread, but why did people here tell me that my magnesium had to be 1350? My calcium is 400, so the MG should be fine at 1200, right?
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IIRC, natural seawater has a Mg value of around 1350ppm, that's why most people will recommend that number.
J.
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I'm H2O intolerant
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06-19-2007, 05:53 PM
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#7
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Big Fishy
Join Date: Jan 2007
Location: Orange County, California
Posts: 639
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Quote:
Originally Posted by jph
IIRC, natural seawater has a Mg value of around 1350ppm, that's why most people will recommend that number.
J.
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sooooo... which thinking is correct?
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06-19-2007, 06:11 PM
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#8
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Shark
Join Date: Aug 2006
Location: san jose, ca
Posts: 1,477
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Quote:
Originally Posted by NewFishGirl
sooooo... which thinking is correct?
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sorry, i was wrong.
natural seawater seems to have a Mg level of around 1285ppm.
ignore my previous statement. i should really verify before posting instead of after 
J.
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I'm H2O intolerant
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06-19-2007, 08:22 PM
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#9
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moddin aint easy
Join Date: Apr 2006
Location: newnan, ga
Posts: 5,697
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alot of people tend to keep their mag, cal, and alk, a little on the high side, i assume its so it can slip down a bit and not get depleted too much, so they can dose it back up. how ever you go about it, everything should be in balance, like whiskey said.
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ANDY
You don't stop laughing because you grow old, you grow old because you stop laughing. Which is ironic, because old people are hilarious.
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06-20-2007, 06:35 AM
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#10
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Tang Lover
Join Date: Jan 2005
Location: Rockville, MD
Posts: 7,323
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As Wiskey stated, Ideally...Mg should be 3x's Ca's level.
The reason some people/sites say aim for 1350, is cause those same sights tell you aim for CA levels of 450 (450x3=1350).
Calcium levels anywhere from 350-450 are perfectly fine. Depending on what your Ca level is, your MG level should be based on that.
TRT's FAQ on marine testing and parameters:
Specifically, Magnesium:
http://thereeftank.com/forums/plain....html#magnesium
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06-20-2007, 03:46 PM
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#11
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moddin aint easy
Join Date: Apr 2006
Location: newnan, ga
Posts: 5,697
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isnt there a was to use epsom salt to bring up your mg?
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ANDY
You don't stop laughing because you grow old, you grow old because you stop laughing. Which is ironic, because old people are hilarious.
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06-20-2007, 10:41 PM
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#12
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Big Fishy
Join Date: Aug 2006
Location: Philadelphia, PA
Posts: 620
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Have you checked the 2 part recipe from reefkeeping.com?
http://reefkeeping.com/issues/2006-02/rhf/index.php
From memory epsom salts is the 3rd part of the 2 part recipe that is added for Mg - but I'm not sure how much you add to get numbers to where you want them (normally you are supposed to add 1 cup of part 3 every time you finish a gallon of parts 1 and 2 I think).
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