Hanna Magnesium tester

[acropora4u]

wow, I don't know about you but for me- this thing is over 300 points off from salifert and apex trident....you?

 

[acropora4u]

I was getting reading of 1650 to 1700 on hanna and 1300 to 1375 With salifert and apex trident

 

[jrloyd]

I tried my Hannah tester two times. First was flashing 1800. Tried it a few days later and it was 1750. I’ve never used a mg supplement, only do weekly water changes of about 10%. I’ve decided it is horribly inaccurate

 

[GardinersReef]

1600-1700 on Hanna, 1475 on Salifert. Salifert is in line with ICP.

 

[acropora4u]

yes, we should all get a refund from hanna

 

[GardinersReef]

I had an ICP done and it confirmed the Hanna was Mag test was off. The ICP also confirmed my salinity was high. My Hanna salinity pen had drifted a ton. It reported 1.025 but it was actually 1.033. Now that my salinity is correct the Hanna Mag test seems to be accurate again.

 

[Randy Holmes-Farley Verified Community Expert]

RMM, baby, RMM.

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