Magnesium wont go up?

[Randy Holmes-Farley Verified Community Expert]

So what would cause my magnesium to not increase as expected when adding it? I added approx 500ml more last night and barely got up 20 points? Should I continue adding at that rate? Confirmed via salifert and apex

Magnesium testing is so inaccurate that I generally recommend not doing it.

https://www.reef2reef.com/threads/just-say-no-to-magnesium-testing-rmm-is-born.1017528/
What exactly are you dosing to what size tank?

 

[MichaelReefer]

Magnesium testing is so inaccurate that I generally recommend not doing it.

https://www.reef2reef.com/threads/just-say-no-to-magnesium-testing-rmm-is-born.1017528/
What exactly are you dosing to what size tank?

B-Ionic magnesium. Redsea 525xl

I also do Triton method... so I cant just rely on water changes because I generally don't do them

 

[Randy Holmes-Farley Verified Community Expert]

B-Ionic magnesium. Redsea 525xl

I also do Triton method... so I cant just rely on water changes because I generally don't do them

What is the volume of that tank?

You can dose, just don’t base dosing on mag testing, IMO. Base it on calcium or alk dosing. :)

 

[MichaelReefer]

What is the volume of that tank?

You can dose, just don’t base dosing on mag testing, IMO. Base it on calcium or alk dosing. :)

System is 143.

 

[Randy Holmes-Farley Verified Community Expert]

ESV claims:

one mL will raise one gallon of aquarium water by 10 ppm.


thus, 500 mL added to 100 gallons would only boost mag by 5 ppm.

 

[kingranch2003]

Magnesium testing is so inaccurate that I generally recommend not doing it.

https://www.reef2reef.com/threads/just-say-no-to-magnesium-testing-rmm-is-born.1017528/
What exactly are you dosing to what size tank?

I was expecting this one sooner Randy lol.

 

[MichaelReefer]

ESV claims:

one mL will raise one gallon of aquarium water by 10 ppm.


thus, 500 mL added to 100 gallons would only boost mag by 5 ppm.

The one i have says 1.5 ml per gallon will raise the water 15ppm a day or 100

I was expecting this one sooner Randy lol.

Well I'm gonna need a heck of a lot to get up to 1350.

I really don't generally check my magnesium very often, as you can tell by it getting this low.

 

[Randy Holmes-Farley Verified Community Expert]

The one i have says 1.5 ml per gallon will raise the water 15ppm a day or 100

Well I'm gonna need a heck of a lot to get up to 1350.

I really don't generally check my magnesium very often, as you can tell by it getting this low.

At least a couple of sites, including BRS say:
Instructions:

Add 1.5 mL per gallon of aquarium capacity per day until a target level of 1200-1350 ppm magnesium is reached.

B-Ionic Magnesium contains 36,000 ppm magnesium, and 1 mL will raise 1 gallon of aquarium water by 10 ppm.

 

[Garf]

The one i have says 1.5 ml per gallon will raise the water 15ppm a day or 100

Well I'm gonna need a heck of a lot to get up to 1350.

I really don't generally check my magnesium very often, as you can tell by it getting this low.

Have you a particular reason to run your salinity at under 1.024? Increasing to 1.026ish would increase mag to around where it should be.