Can dosing MAG raise dKH?

I’m not a chemist but the magnesium alters the calcium and alkalinity bond. It may be that your magnesium levels are not raising your alkalinity but keeping too much from bonding with calcium which could or could not raise your levels.

That was my initial thought, but if you compare my first test to me second test, both mag and alk are up..
 
I was just thinking out loud, but that would be the case. You need a certain magnesium level to stop precipitation or the calcium and alkalinity bonding to a level where it would precipitate out or become useless to the corals because they can’t uptake it. As your magnesium levels increased to the point needed(1350 +/-) the calcium and alkalinity bond would alter to a natural level where they would not over bond together. It could be a million things, but I don’t see any glaring problems with your parameters that would cause me to freak out. I have a Red Sea test kit and I’m off on my testing due to light on a regular basis. I normally look at when I think it changes to when I know I went too far and go from there. It’s normally within .2 to .4 so I don’t worry about it.
 
I’m not a chemist but the magnesium alters the calcium and alkalinity bond. It may be that your magnesium levels are not raising your alkalinity but keeping too much from bonding with calcium which could or could not raise your levels.
No, that is not impacting this situation. Magnesium does not cause alk to rise by this or any other mechanism. You can reduce demand for alk by reducing precipitation, but it does not ever cause alk to rise if you are not dosing any alk.
 
No, that is not impacting this situation. Magnesium does not cause alk to rise by this or any other mechanism. You can reduce demand for alk by reducing precipitation, but it does not ever cause alk to rise if you are not dosing any alk.
Thanks for the clarification.
 

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