chelated Fe from FeSo4 + Na4EDTA - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 04-11-2004, 02:45 PM Thread Starter
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Ferrous Sulphate: 5 gram
Na4EDTA : 6.84 gram
water : 1000 gram
anyone can tell me about this solution?
how many ppm of fe does this solution have?
how many dosage needed to reach 0.1ppm in aquarium?
i heard that fe could be absorb if there's enough MgS04, how many MgS04 needed??
thank you
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post #2 of 6 (permalink) Old 04-12-2004, 01:19 AM
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:shock: Try a chemistry site maybe a chemistry buff can help you but I aint the guy. I'm just a humble fish tank keeper.
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post #3 of 6 (permalink) Old 04-12-2004, 01:28 AM
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Quote:
Originally Posted by jimmy
Ferrous Sulphate: 5 gram
Na4EDTA : 6.84 gram
water : 1000 gram
anyone can tell me about this solution?
how many ppm of fe does this solution have?
how many dosage needed to reach 0.1ppm in aquarium?
i heard that fe could be absorb if there's enough MgS04, how many MgS04 needed??
thank you
Mabey I can help. Is this something that you just made yourself, or found on the internet? If so I need a little more background on what Na4EDTA is. What do you mean by MgSO4 absorbing Fe?
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post #4 of 6 (permalink) Old 04-12-2004, 03:03 AM
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Well, EDTA is Ethylene-Diamine-Tetra-Acetate, a common chelator used in the laboratory (also in fertilizers as a source of chelated iron, I think). The question about ppm (with respect to Fe) can only be answered if we know what iron sulfate was used: Iron(II) = FeSO4 or Iron(III) Fe2(SO4)3
Iron(III) would be my guess.

Based on that you can calculate how much Iron you have in the solution. The problem with mixing the chelator and the Iron sulfate is that it might fall apart pretty quickly in your tank because the affinity of EDTA to Mg and Ca is very high and might displace the Iron depending on concentrations...

TD
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post #5 of 6 (permalink) Old 04-12-2004, 03:06 AM
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We know that it is FeSO4, becuase he said ferrous iron (Fe2+). But I was thinking the same thing, what iron state, ferrous or ferric (Fe3+) - And I believe he meant Fe3+. If it was Fe2+ why would he need it to be chelated? (but of course it will oxidize in the tank) I also second the other point of the chelator falling apart in the tank. EDTA is commonly used in handsoaps to bond with Ca++ and Mg++ ions in hardwater so that it can foam.
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post #6 of 6 (permalink) Old 04-12-2004, 09:15 AM Thread Starter
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well...
i dont know for sure. my friend gave me this reciepe.
sorry i wos wrong i meant: plant absorb fe if only there is enough mgso4
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