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Re: [APD] Removes "heavy metals"?
EDTA is commonly used in molecular biology as a chelator to mop up divalent
cations, especially Mg2+.
- Rory
> Antonio,
>
> You are not being neglected.
>
> I do not know the answer to the question "Someone know what are those
> afinities (EDTA) with common metals?" therefore I did not answer...
>
> Regards,
>
> Laith
>
>
> -----Original Message-----
> From: António Vitor [mailto:antonio_vitor at sapo.pt]
> Sent: 17 August 2004 12:58
> To: aquatic plants digest
> Subject: Re: [APD] Removes "heavy metals"?
>
> I posted 2 times, made a question...
> and no answers !
>
> that is annoying...
>
>
> ----- Original Message -----
> From: "António Vitor" <antonio_vitor at sapo.pt>
> To: "aquatic plants digest" <aquatic-plants at actwin_com>
> Sent: Tuesday, August 17, 2004 12:53 PM
> Subject: Re: [APD] Removes "heavy metals"?
>
>
>> Is only my impression, or my posts are being neglected???
>>
>> António Vitor
>>
>> ----- Original Message -----
>> From: "Laith Arif" <laith at swissonline_ch>
>> To: "'aquatic plants digest'" <aquatic-plants at actwin_com>
>> Sent: Tuesday, August 17, 2004 7:35 AM
>> Subject: RE: [APD] Removes "heavy metals"?
>>
>>
>>> So I guess there isn't really an issue here. The conditioner is not
> going
>>> to have an impact on the ferts/nutrients/traces for the plants.
>>>
>>> Thanks for clearing that up!
>>>
>>> Laith
>>>
>>>
>>> -----Original Message-----
>>> From: S. Hieber [mailto:shieber at yahoo_com]
>>> Sent: 17 August 2004 00:42
>>> To: aquatic plants digest
>>> Subject: RE: [APD] Removes "heavy metals"?
>>>
>>> I believe Dr. Morin's basic point was that Prime "grabs"
>>> the heavy metals before iron and such.
>>>
>>> Scott H.
>>> --- Laith Arif <laith at swissonline_ch> wrote:
>>>
>>>> Ok, thanks for the info and the links.
>>>>
>>>> So Greg Morin is correct when he says "This should not be
>>>> an issue unless
>>>> you are really wanting to keep high levels of lead,
>>>> mercury and cadmium ;-)
>>>> (all toxic heavy metals)."?
>>>>
>>>> It's mainly these toxic heavy metals that are
>>>> removed/neutralized?
>>>>
>>>> The reason I asked in the first place was just wondering
>>>> whether at every
>>>> water change and the addition of the conditioner, I was
>>>> basically starting
>>>> out with water "bare" of all metals and needed to take
>>>> this into account
>>>> when dosing ferts and traces.
>>>>
>>>> Thanks for the input.
>>>>
>>>> Regards,
>>>>
>>>> Laith
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: S. Hieber [mailto:shieber at yahoo_com]
>>>> Sent: 16 August 2004 11:36
>>>> To: aquatic plants digest
>>>> Subject: Re: [APD] Removes "heavy metals"?
>>>>
>>>> None of hte elements in the aquariumare, say, converted
>>>> to
>>>> energy -- if they are there before the conditioner is
>>>> added, they are there afterwards. It's a matter of the
>>>> chemical or ionic bonds and what compounds are in the
>>>> tank.
>>>>
>>>> Conditioners that "remove" chloramine break up the
>>>> compound
>>>> into constituents that can then remain separate or
>>>> recombine with other elements to form new compounds.
>>>> Something that breaks up chloramine could leave your tank
>>>> with a sudden dose of ammonia.
>>>>
>>>> Some conditioners bind the elements and bind some
>>>> so-called
>>>> heavy metals. The metal elements are not gone, but tied
>>>> up
>>>> in a compound that is presumably less risky to fish or
>>>> plants. Some conditioners, like SeaChem Prime break up
>>>> chloramine and then "grab" the nitrogen in a new compound
>>>> less harmful to fish but still available to plants as a
>>>> nutrient.
>>>>
>>>> There is an order of "preference" for what metals a
>>>> conditioner will grab.
>>>>
>>>> There are lots of posts in the archives. Here are a few:
>>>>
>>>>
>>> http://fins.actwin.com/aquatic-plants/month.200102/msg00171.html
>>>>
>>>>
>>> http://fins.actwin.com/aquatic-plants/month.200302/msg00030.html
>>>>
>>>>
>>> http://fins.actwin.com/aquatic-plants/month.200303/msg00029.html
>>>>
>>>> It matters what conditioner you use. If you have
>>>> chloramines, you want something thatdoesn't leave you
>>>> with
>>>> a sudden dose of ammonia. As for trace metals, I don't
>>>> think it's an issue. If there is nothing else to bind,
>>>> some
>>>> iron might be bound but the amount is small and a worthy
>>>> trade-off for gaurding against chlorine, chloramine, and
>>>> heavy metals. And the bound iron can still be gotten by
>>>> the
>>>> plants eventually.
>>>>
>>>> Good luck, good fun,
>>>> Scott H.
>>>> --- Laith Arif <laith at swissonline_ch> wrote:
>>>>
>>>>>
>>>>> I'm curious to know what exactly my water conditioner
>>>>> (JBL Biotopol) means
>>>>> by "removes heavy metals"... Does anyone know?
>>>>>
>>>>> Just wondering if besides removing chlorine and
>>>>> chloramine it's also
>>>>> removing useful plant nutrients (micro and/or macro).
>>>>
>>>>
>>>> =====
>>>> Want to get dirty but stay clean?
>>>>
>>>> Diana Walstad, author of _Ecology of the Planted
>>>> Aquarium_ will discuss soil
>>>> supplemented aquarium substrates at the 2004 AGA
>>>> Convention.
>>>>
>>>> Convention Details/Registration at aquatic-gardeners.org
>>>> & gwapa.org
>>>>
>>>>
>>>> _______________________________________________
>>>> Aquatic-Plants mailing list
>>>> Aquatic-Plants at actwin_com
>>>> http://www.actwin.com/mailman/listinfo.cgi/aquatic-plants
>>>>
>>>
>>>
>>> =====
>>> Want to get dirty but stay clean?
>>>
>>> Diana Walstad, author of _Ecology of the Planted Aquarium_ will discuss
>> soil
>>> supplemented aquarium substrates at the 2004 AGA Convention.
>>>
>>> Convention Details/Registration at aquatic-gardeners.org & gwapa.org
>>>
>>>
>>> _______________________________________________
>>> Aquatic-Plants mailing list
>>> Aquatic-Plants at actwin_com
>>> http://www.actwin.com/mailman/listinfo.cgi/aquatic-plants
>>>
>>
>> _______________________________________________
>> Aquatic-Plants mailing list
>> Aquatic-Plants at actwin_com
>> http://www.actwin.com/mailman/listinfo.cgi/aquatic-plants
>>
>
>
>
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