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Unread 04/27/2012, 08:06 AM   #12
reefnewbie83177
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Join Date: Nov 2011
Posts: 200
Quote:
Originally Posted by Randy Holmes-Farley View Post
i do not think magnesium is that high due to Purple Up unless you added massive amounts. In 100 gallons of water, you need to add 3 liters of a pure magnesium supplement (like B-ionic Magnesium) to boost magnesium by 300 ppm.
That's exactly what I thought Randy. I will be testing a pre-mixed batch of saltwater later this afternoon. If it shows really high Mg then I will assume that it is either a bad batch of Instant Ocean or my test kit is severely off. I just don't know what else it could be. It's not like Mg can just spontaneously enter my water.


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