Maybe like 18ppm somewhere between 15 and 20 I'd say from the picture.
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I just did a comparison using api...im getting about 20 there..Maybe like 18ppm somewhere between 15 and 20 I'd say from the picture.
This was right after a water change.I looked close at the picture and I can see that the 20 looks a little darker than the sample. If you can see it then your lower than that value.
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That's with it over both 20 and the 10
I really do not like the color match, but It looks as though you are fineWhat do you guys think of ph?
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I got my salt sample back from af and mag is set at 1350, I've done 3 5 gallon water changes and yet it hasn't come down at all..

There is another post that has the results listed @Perry
Magnesium
https://www.reef2reef.com/index.php?threads/Magnesium.309344/

