Magnesium hasn't gone down

acuralegend94 · Jan 8, 2015

Hey guys! I'm curious as to why my magnesium levels have not gone down for the past three months. My last water change was exactly three months ago (Yes I know I should be doing more water changes.) Anyhow, my magnesium levels have been at 1650 since that water change. I have Lps, zoas, a large 8" clam, and tangs. I've tested the levels with two different salifert mag test with the same results. All life is healthy.

Parameters:
120 gal tank
40 gal sump

Mag 1650
Calcium 460
Alk 8.2
Ph 8.8
Nitrates 0
Ammonia 0
Salinity 1.025

I dose Kalk weekly

Thanks!

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sonnus · Jan 8, 2015

Magnesium is usually used up by marine organisms at a much slower rate than calcium so it might take a while for it to go down. Magnesium is regularly boosted above normal sea levels to treat bryopsis without any significant adverse problems. I wouldn't worry about it, I routinely keep my magnesium levels this high.

LAreefguy · Jan 8, 2015

my mag has been at 1500 for the past year. It never goes down and i can't figure it out. But after a while I just gave up and was happy i never have to dose it. As far as i was able to figure out there isn't really ill effects due to it now going down.

Magnesium hasn't gone down

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