Anyone else get high mag readings in ICP tests this week?

[CMO]

I'm not sold on the mag levels that came back in both of my ICPs this week. Both readings are about 100 points higher than my Trident and Salifert mag tests read (both of which are spot on with one another). Mag usually lines up well between ICP and home tests / Trident for me.

 

[Dragon52]

#reefsquad

 

[Retro Reefer]

I haven’t seen any other reports with similar issues But I would tend to agree with your matching self administered tests.

 

[DLHDesign]

Mg (from sample on 11/27; measured at ICP on 12/4):
Triton ICP: 1353
Trident: 1367

Since the Trident has a +/-15ppm range and I imagine ICP is about the same, those are pretty well in agreement I'd say.

 

[CMO]

Mg (from sample on 11/27; measured at ICP on 12/4):
Triton ICP: 1353
Trident: 1367

Since the Trident has a +/-15ppm range and I imagine ICP is about the same, those are pretty well in agreement I'd say.

Interesting and that's the same date of my ICP as well. That's about what I usually see between the 2 as well. I guess i'll find out at my next ICP test for sure.

Thanks for the response.

 

[DLHDesign]

I think I recall hearing that Mg testing requires stable temperatures in order to be accurate, but I don't recall how much of a variation could be caused by however much temperature variation... I can't imagine it would explain a 100ppm difference, however. Odd.

(Also; NOTE: My Trident is recently hooked up and not calibrated to my aquarium yet. Doubt that'll explain anything additional, but just FYI.)

 

[CMO]

Interesting. I didn't know that about the temp for mag. Yeah if my salifert didn't match my Trident I would be inclined to believe the ICP. And my Trident has been running a while and recently calibrated too.

 

[DLHDesign]

Interesting. I didn't know that about the temp for mag.

And now I can't find the article I came across, of course... :-\

 

[Reefahholic]

Interesting. I didn't know that about the temp for mag. Yeah if my salifert didn't match my Trident I would be inclined to believe the ICP. And my Trident has been running a while and recently calibrated too.

CMO, I think your Trident and Salifert are more accurate on this one. Something about testing water fresh from the tank.