Magnesium test kit - The Planted Tank Forum
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post #1 of 5 (permalink) Old 11-02-2018, 04:36 AM Thread Starter
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Magnesium test kit

What company makes a freshwater Magnesium test kit?
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post #2 of 5 (permalink) Old 11-02-2018, 12:41 PM
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There is really nothing much available for the range we use in planted aquariums. The way I measure Mg is test for GH and Ca, then calculate Mg.

How do I test for Mg?
First test for GH and Ca, then calculate Mg.
Mg testing
((17.86 x dGH) - (2.5 x Ca ppm)) / 4.1 = Mg ppm
(ppm dGH - (2.5 x Ca ppm)) /4.1 = Mg ppm
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post #3 of 5 (permalink) Old 11-03-2018, 11:02 PM
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JBL has a freshwater magnesium test kit. could probably find it on ebay or amazon
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post #4 of 5 (permalink) Old 11-04-2018, 12:06 AM
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Quote:
Originally Posted by Liquidgarden View Post
What company makes a freshwater Magnesium test kit?
I found what may be the only FW Mg test kit in the World (from what I can tell) that seems to do a decent job of testing Mg only (I calibrated by making my own known mixes of Mg). It's made by JBL (JBL | Vorsprung durch Forschung) in Germany. I got it via Ebay from one of several British sellers (pro-shrimp.co.uk). Make sure you get the FW version and not the SW version. I forget what I paid, but it was reasonable at 2-3 times an API-type kit.
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post #5 of 5 (permalink) Old 11-04-2018, 12:00 PM Thread Starter
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Quote:
Originally Posted by Deanna View Post
I found what may be the only FW Mg test kit in the World (from what I can tell) that seems to do a decent job of testing Mg only (I calibrated by making my own known mixes of Mg). It's made by JBL (JBL | Vorsprung durch Forschung) in Germany. I got it via Ebay from one of several British sellers (pro-shrimp.co.uk). Make sure you get the FW version and not the SW version. I forget what I paid, but it was reasonable at 2-3 times an API-type kit.
Thanks, that's the only one I saw too. Thanks for confirming if it works well.
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