Magnesium
Printed From: Utah Reefs
Category: Specialized Discussion
Forum Name: Reef Chemistry
Forum Description: A place to discuss reef chemistry.
URL: http://www.utahreefs.com/forum/forum_posts.asp?TID=57063
Printed Date: December 28 2025 at 5:33am
Software Version: Web Wiz Forums 12.03 - http://www.webwizforums.com
Topic: Magnesium
Posted By: jmw
Subject: Magnesium
Date Posted: June 10 2012 at 5:35pm
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Is is possible for a tank to hold a consistant magnesium level? I keep checking my mag level and haven't had to dose for nearly 2 months. I'm starting to think I may have a bad test kit. (Red Sea) Nothing appears wrong with the tank, it is a mature tank with rock over 4 years old.
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Replies:
Posted By: Mark Peterson
Date Posted: June 10 2012 at 9:04pm
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Yes, for a while. I have had tanks I didn't need to dose Mg for 6 months or more. It depends on what coral are kept. Is Coralline Algae growing? What level is the Mg?
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Posted By: jmw
Date Posted: June 11 2012 at 12:04pm
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Thanks Mark
At the start of December I had the Mag level at 1000-1100. At the end of Dec. I noticed it climbing and it was aroud 1500 at that time, so I cut the dosing in half and it seemed to stablize a little. I thought! Then around the end of Jan. it tested at 1780, so I stopped all dosing on Jan 24. It has slowly fallen but only 0010 to 0020 every week or two. It seemed to settle at 1400 - 1440 around the first of April and has stayed the same. Back in Dec. I had Coralline Algae growing on the glass, but I think the high level of Mag. has kinda stopped it. Like I said, I'm not too concerned right now....or should I be? I just figured I will keep monitoring it.
Alk - 9
Cal - 430
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Posted By: Mark Peterson
Date Posted: June 11 2012 at 1:46pm
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An important rule of reefkeeping is to dose only what is needed as it is needed to keep levels within range. Testing is key. The acceptable Mg range is about 1200-1400 ppm so it's good now. Growth comes and goes depending on an assortment of things. Enjoy  ------------- Reefkeeping Tips, & quick, easy setup tricks: www.utahreefs.com/forum/forum_posts.asp?TID=9244 Pay it forward - become a paid WMAS member
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