Salifert magnesium test

[cba191]

Is it just me? Or is the salifert magnesium test dumb. It never changed color.

 

[Fish Fan]

Mine seems to work well for the times I use it. Magnesium is notoriously difficult to test accurately, and some don't bother testing for it at all. Here's a link from RHF on magnesium testing:

https://www.reef2reef.com/threads/just-say-no-to-magnesium-testing-rmm-is-born.1017528/

 

[cba191]

Mine seems to work well for the times I use it. Magnesium is notoriously difficult to test accurately, and some don't bother testing for it at all. Here's a link from RHF on magnesium testing:

https://www.reef2reef.com/threads/just-say-no-to-magnesium-testing-rmm-is-born.1017528/

I'd never measured before, but am trying some gonis. As far as the test is concerned, I'm over 1500.

 

[CHSUB]

Mine seems to work ok, but believe it is inaccurate at about +/- 100 ppm.

 

[Fish Fan]

Are you dosing anything that may be rising it? Check out the link I posted above, it's got some good info on why it's not easy to measure Mag, and how to dose it based on Calc consumption.

 

[CHSUB]

I'd never measured before, but am trying some gonis. As far as the test is concerned, I'm over 1500.

Gonis and success with high mag is a myth, imo.

 

[cba191]

Are you dosing anything that may be rising it? Check out the link I posted above, it's got some good info on why it's not easy to measure Mag, and how to dose it based on Calc consumption.

Im using afr and seachem trace

 

[Rixar]

my salifert magnesium test indicates 1260ppm, my ICP test indicates 1326ppm

 

[Randy Holmes-Farley Verified Community Expert]

Is it just me? Or is the salifert magnesium test dumb. It never changed color.

Can you describe the tank in terms of age, salt mix, water changes, and whether you’ve added mag besides the AFR?

 

[cba191]

Is it just me? Or is the salifert magnesium test dumb. It never changed color.

Can you describe the tank in terms of age, salt mix, water changes, and whether you’ve added mag besides the AFR?

The tank is just 2 months old. I'm using redsea reef mix. I've been changing 20% each week.

 

[Randy Holmes-Farley Verified Community Expert]

The tank is just 2 months old. I'm using redsea reef mix. I've been changing 20% each week.

Then the real magnesium value reflects exactly what is in the salt mix, whether the test is reading correctly, or in error.

I’d just stop measuring it.