What can influence a tank's Mg reading

[StirCrazy]

Originally Posted by Delphinus

I am betting dollars to donuts now that the issue is in fact the test kit can't tell me a number less than 900. I will test tonight with Salifert and see what shakes out.

If the salinity levels are the same I am with you on the test kit.

no reason for excessive Mg consumption in your tanks.

Steve

[Delphinus]

Salifert says 1005, Elos still says 900 tonight.

I was wrong about Salifert resolution at 30, it's 30 units apart on the lookup sheet but going up in 0.02ml increments. So it's really 15.

I also dropped the vial for the Elos test kit and shattered it into about a billion little shards. Yay me. Man those things break super easy.

[Myka]

Hmmm...that's interesting that the two kits are so far off from eachother. I "hate" it when that happens. Could it be that the kits are only off by like 30 or 40 from eachother, but because the Elos jumps by 75 per drop it's showing 105 off?

[Delphinus]

Yeah, I'm not too pleased with the disparate readings. I don't think I've ever had the two read exactly the same but it's never been this far apart. I wonder which one is slipping. Ugh, I hate test kits. Although at least they give me a rough ballpark if nothing else.

[Delphinus]

So I've confirmed now that Elos simply can't tell you anything less than 900.

And I've confirmed that my RBS salt has very low Mg at 825.

Ugh, well, at least that mystery is solved.

[RuGlu6]

So i guess we are now back to a question:
What is the best reef salt out there

[StirCrazy]

Originally Posted by RuGlu6

So i guess we are now back to a question:
What is the best reef salt out there

IO

Steve