Magnesium Low

[SaltyMomma]

Hey reefers

I’m trying to raise magnesium in my 38-gallon reef tank from 1150 ppm to around 1350–1400, but I don’t want to mess with powders or do a bunch of chemistry-style calculations.

I know a lot of you dose Mag chloride or Mag sulfate, but I’m looking for a simple, no-mix liquid solution that I can just measure and pour in — ideally something reef-safe and easy to dose without needing a scale or converting grams and ppm all the time.

Has anyone used a liquid magnesium product that worked well for you and was beginner-friendly?
Also, any dosing tips (tablespoons/cups or mL amounts) would be super helpful

Thanks in advance!

 

[Fish Fan]

The simplest solution is to just not measure your mag; problem solved

Just say NO to magnesium testing: RMM is born

OK, this thread has been many years in the making, and I'm posting it here since folks in the chem forum are probably already tired of all the threads relating to problematic magnesium testing. I'm going to propose a method, let's call it the Randy Magnesium Method, or RMM for short. All good...

www.reef2reef.com

Good luck!

 

[trmiv]

ESV Magnesium is probably the best price for an already mixed liquid.

 

[Matt Bravo]

I’ve always used Red Sea foundation C, it’s pretty straight forward and has always been reliable for me. It comes with a small measuring cup too (about 50mL.) Also one thing about mag is that it takes decent amount to raise it a little, if you’re still unsure if you did the math correctly you could always dose less and see where you end up

 

[rishma]

The simplest solution is to just not measure your mag; problem solved

Just say NO to magnesium testing: RMM is born

OK, this thread has been many years in the making, and I'm posting it here since folks in the chem forum are probably already tired of all the threads relating to problematic magnesium testing. I'm going to propose a method, let's call it the Randy Magnesium Method, or RMM for short. All good...

www.reef2reef.com

Good luck!

^this is the way

 

[Miami Reef]

I’m trying to raise magnesium in my 38-gallon reef tank from 1150 ppm to around 1350–1400

The magnesium test result is likely inaccurate. It’s a common issue with Mg tests.

Water changes semi regularly or complete additive systems will automatically maintain Mg. It depletes very slowly, and salt mixes usually contain an excess. It’s not likely for salt mixes to be deficient like that.

 

[John Neuzil]

Brightwell Magnesium

 

[SaltyMomma]

Thank you all!

 

[Fish Fan]

Thank you all!

Did you get your question answered? I wasn't being flippant with my first response, many here at R2R do not bother testing for magnesium. It's known to be difficult to test accurately, and it's not used at nearly the rate as Alk and Calc. Regular water changes are often enough to keep up with Mag.

Further, if you're keeping soft corals and not stoney corals, Alk, Calc, and Mag are somewhat less important to keep track of. Again, regular water changes will go a long way to keeping up with these elements.

If you need further help, please post back