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07/13/2020, 04:05 PM | #1 |
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Raising Magnesium
Hello,
I need to raise my Magnesium. I have seachem advantage dry and did my calculations on the reef chemistry calculator and you need a lot of product to raise the number and it needs a fair amount of ro to dissolve properly. Is there a better product which I can use? My mag reading is 1245ppm and I want to get it to 1350ppm. Is 1245ppm low? Thanks
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07/13/2020, 04:57 PM | #2 | |
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Quote:
I have always suggested the range might be 1260-1360ppm. Seachem has a liquid mg in their AquaVitro line which has worked well. Increase it, sure, when you have time... It’s not better...but maybe easier.... I do the same for Alk and CA, buying the liquid Seachem Fusion 1 and 2 as the concentration is always the same, so dosing becomes much easier, and for my much more accurate. |
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07/13/2020, 05:49 PM | #3 |
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There are DIY products that are somewhat cheaper, but raising magnesium takes a lot of product. I am not sure what's available in English. There's a de-icer, "Mag Flake", that's available in the US that's good.
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07/14/2020, 01:29 PM | #4 | |
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I need help because I got a result I wasn’t expecting. Actual water volume 190 Litres. This is the seachem magnesium adav (dry) https://www.dropbox.com/s/4l48w7omdl..._0723.jpg?dl=0
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07/14/2020, 06:34 PM | #5 |
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That product is effectively just some epsom salts. You might be able to get that at a drugstore.
This calculator should help: http://reef.diesyst.com/chemcalc/chemcalc.html I get about 250 grams. I might try half of that, and see what happens.
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Jonathan Bertoni |
07/15/2020, 03:42 AM | #6 | |
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07/15/2020, 12:14 PM | #7 |
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Are you sure that the volume estimate is accurate? How did you compute it?
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Jonathan Bertoni |
07/15/2020, 12:30 PM | #8 | |
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I’ve tested again tonight and it now reads 1335ppm.
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07/15/2020, 01:44 PM | #9 |
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This is the reason I asked for that amount to worked out from the instructions rather than on the calculator so I could compare the two dosage from manual
Working out and the reef calculator just to make sure it was correct. I will double check the water volume. How much do you compensate rock for, and sandbed?
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07/15/2020, 09:48 PM | #10 |
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I've never found a convincing formula for compensating for rock and sand. I got the measurements for my tanks by doing water changes and when emptying them to move them. I had to move them more than I liked.
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07/16/2020, 12:34 AM | #11 | |
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1380 was measured a few hours after dosing and 1335 was measured around 24hrs after. I dose mag through my doser everyday as I do the ATI essentials balling method.
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07/16/2020, 01:37 AM | #12 |
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Those numbers are not all that far apart, and might be due to a tiny bit of mixing still happening and normal noise in test results. A 15 ppm error per test result is a reasonable estimate of the noise, I think.
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Jonathan Bertoni |
07/16/2020, 02:47 AM | #13 | |
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07/16/2020, 03:44 AM | #14 |
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That should be safe enough. I wouldn't worry at all. We generally say to limit changes to 100 ppm per day for magnesium.
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Jonathan Bertoni |
07/17/2020, 09:25 PM | #15 |
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I have raised mine quicker than 90ppm at a time with no negative results.
But every system is different.
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