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Old 02/16/2020, 06:48 PM   #1
wkp42
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Join Date: Jan 2011
Posts: 64
Mg very high, not dosing it though

Temp 77.4
Salinity 1.026
PH 7.9
KH 8.2
Ca 500
Mg 1800
No3 4
Po4 0.2

My magnesium stays constant around 1700 over time but I am not dosing anything but kalkwasser. I use Red Sea coral pro salt. I also dose NoPox and recently got my No3 and Po4 to 0 and held it there for about a week BUT my Mg was high before I ever started NoPox.

What could make Mg stay high? Do I need to try to lower it? I do 30% water change every 7-10 days. Am I doing to much water change? Should I do 15% water change weekly or 30% biweekly?


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Old 02/17/2020, 12:07 AM   #2
bertoni
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Location: Mountain View, CA, USA
Posts: 88,320
I would measure some freshly-mixed saltwater. Most often, high magnesium levels are caused by salt mix issues. That level is safe enough, so I wouldn't worry for now.


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Old 02/18/2020, 10:17 AM   #3
clevername
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Join Date: Feb 2007
Location: Manchester, MO
Posts: 1,022
Quote:
Originally Posted by bertoni View Post
I would measure some freshly-mixed saltwater. Most often, high magnesium levels are caused by salt mix issues. That level is safe enough, so I wouldn't worry for now.
+1 Check the source first


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