High % of MgO in traces. Good or bad ? - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 01-18-2013, 08:32 AM Thread Starter
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High % of MgO in traces. Good or bad ?

High % of MgO in traces. Good or bad ?

Hello,

I have found here, locally in Romania, an powder with the following components:

Version A:
MgO 10%
B 0,5%
Cu 2%
Fe EDTA 3,5%
Mg 0,5%
Mo 0,8%
Zn 0,3%

Version B:
MgO 5%
B 0,5%
Cu 1.5%
Fe EDTA 4%
Mg 4%
Mo 0,1%
Zn 1.5%

What i see if i compare with CSM+B is that MgO is way higher than that.
is this a bad thing or is OK ? Can be used for traces ?

thanks' in advance for help
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post #2 of 7 (permalink) Old 01-18-2013, 09:14 AM
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This is an interesting trace mix; the magnesium content is very high.

Traditional CSM+B has:

Fe - 6.53%
Mn - 1.87%
Mg - 1.4%
Zn - 0.37%
Cu - 0.09%
Mo - 0.05%
B - 1.18%

You can see that your trace mix has less iron, no manganese, much higher magnesium, higher/lower zinc (type B and A, respectively), higher copper, much higher molybdenum, and lower boron content.

I would say that your trace mix might not be usable - there is no manganese for starters, and the molybdenum content is quite high. I am not too sure what effect it will have on livestock.

Anthony

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post #3 of 7 (permalink) Old 01-18-2013, 11:52 AM Thread Starter
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Thank's DB for reply.
It has Mn, but i've wrote wrongly, it is instead of the Mn.

I assume if i make test with it and with some RCS it can tell if you kill or not your stock.

I'm more curious what is the effect of high Mg on the plants ... since if i read correctly can involve stunts at high rate of Mg and low rate of Ca.
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post #4 of 7 (permalink) Old 01-18-2013, 12:02 PM
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it takes a huge amount of mg to stunt plants, and it has more to do with total salt buildup in water than high mineral content

200-300 ppm of magnesium will not stunt plants, same with other nutrients
maybe if all nutrients were at 300 ppm you might see an affect, but it's not likely to happen
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post #5 of 7 (permalink) Old 01-18-2013, 02:44 PM Thread Starter
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Thanks' HD.

So that means i should worry more about the high level of Cu, which is more toxic to live stock?

But, if i calculate correctly, a solution similar cu CSM+B dilution, will gave me in 60lt an Cu PPM of 0.08, but i'm not very sure about this. i need to 2ble calculate.
Should be this level dangerous ?
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post #6 of 7 (permalink) Old 01-18-2013, 08:37 PM
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Quote:
Originally Posted by albu81 View Post
Thanks' HD.

So that means i should worry more about the high level of Cu, which is more toxic to live stock?

But, if i calculate correctly, a solution similar cu CSM+B dilution, will gave me in 60lt an Cu PPM of 0.08, but i'm not very sure about this. i need to 2ble calculate.
Should be this level dangerous ?
CSM has the following composition:

CSM+B Plantex
Guaranteed Analysis:

Total magnesium - water soluble chelated magnesium 1.5%
Copper - chelated 0.1%
Iron - chelated 7.0%
Manganese - chelated 2.0%
Molybdenum 0.06%
Zinc - chelated 0.40%
Boron 0.04%

As you can see, it has much less copper than your trace mixes.

Mix A has 20 times more copper, while Mix B has 15 times more copper than CSM+B.

If your calculation for CSM+B is correct (I did not check the math), and gives 0.08 ppm of copper for dosing, then your mixes will give 1.6 ppm and 1.2 ppm, respectively.

Anthony

A Primer to Pressurized CO2 and A Primer to Planted Tanks
Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
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post #7 of 7 (permalink) Old 01-18-2013, 09:28 PM
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at 1.2 ppm this is dangerous to livestock and plants if kept in the tank. it the level in the tank is kept below .1 ppm. i doubt you'll see any livestock issues.
sensitive shrimp could be affected, but fish. hardley. they are medicated usually around the .5 ppm range
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