Magnesium magically stable (and high)

[Reef Pilot]

I was running about 1500+ mg in my tank for a while, too. I never dose mg, but I dose Seachem Reef Advantage Calcium which adds mg along with the ca. I was also using Royal Nature salt for a time which I think had more mg in it. Lately I have been using just the cheap Instant Ocean salt, and my mg is now running around a more normal 1200.

[Reefer Rob]

I'm pretty sure Instant Ocean's Mg levels are up lately, perhaps Reef Crystals is as well.

[Delphinus]

Cool! I would imagine it's your salt and you seem to be pretty diligent with waterchanges. Test your incoming and see what it's at, I bet that's why.

[christyf5]

yeah mine is pegged at 1500 too. I think there is some truth to the IO being high in Mg or something because I haven't changed my dosing at all and occasionally (ok I'll say it, more often than not) my mg dosing container is needing to be refilled yet mg levels haven't dropped (20% weekly WC)

[kien]

yup, me too. Used IO a lot and have not dosed mag for over two years now. I still have a container of Mag that I bought from chemmaster two years ago that's unused if anyone wants it

[christyf5]

Wow. Maybe I'll stop mg dosing for awhile and see where the numbers go. I don't have any coralline as well but then I haven't seen much since I started the tank

[kien]

Originally Posted by christyf5

Wow. Maybe I'll stop mg dosing for awhile and see where the numbers go. I don't have any coralline as well but then I haven't seen much since I started the tank

What I've found is that my Mg never depleted very fast at all and always hovered around 1300 to 1400 with regular water changes. I tested often at first because I bought myself a fancy schmancy 4 head doser to take care of dosing Alk, Calc and Mag but the doser never got set up to dose Mg since my mag never depleted enough to warrant dosing. I do weekly water changes of 10% with the occasional missed week here and there. Or the occassional missed month like in December