Magnesium at 1440

Willbiker · Jan 31, 2021

Is a magnesium reading of 1440 ppm too high? I've removed and replaced my sandbed over the last 3 weeks resulting in more water changes than usual and I have only ever dosed magnesium once which was 1 month ago which got my level to my target of 1300.
Alk is 9.6 and calc is 460.

Should I act or leave it be and hope it lowers...

Thanks

Uncle99 · Jan 31, 2021

Nope, not too high.
Just go back to your normal water change regiment.
Let it fall on its own.

Willbiker · Jan 31, 2021

Uncle99 said:
Nope, not too high.
Just go back to your normal water change regiment.

Thank you!

346700984 · Feb 10, 2021

Mine is also at 1440, up from 1400 a few weeks ago. Changes made since then were adding some coral, copepods/phytoplankton and a couple fish. Calcium/alk remained the same and are good. Trying to figure out why ours went up. We were told back in the beginning to aim for 1400 for mixed reef.

homer1475 · Feb 10, 2021

Not an issue at all.

We used to purposely raise magnesium to well over 1500 to combat bryopsis with a certain magnesium supplement.

Gordonm · Feb 10, 2021

Mine is at 1600 and so what.....

Randy Holmes-Farley · Feb 10, 2021

Gordonm said:
Mine is at 1600 and so what.....

At some level close to or a bit above that, snails are reported to be lethargic, which presumably is not a good sign.

Garf · Feb 10, 2021

reefergirl04 said:
Mine is also at 1440, up from 1400 a few weeks ago. Changes made since then were adding some coral, copepods/phytoplankton and a couple fish. Calcium/alk remained the same and are good. Trying to figure out why ours went up. We were told back in the beginning to aim for 1400 for mixed reef.

An increase of 40 is well within my testing error / repeatability zone. If you ain’t added any, you ain’t added any, in my book.