Re: mixing water -Reply

[Graham Beek <graham@beermat.demon.co.uk>]

In article <000a01be403c$2207bb20$dacfa1d1@default>, ALEX PASTOR
<alexp@idirect.com> writes
>I had doubts about the water softeners myself as
>>the original piece stated that the resins were harmful because they were
>>recharged with a salt solution, and worked by replacing the calcium ion
>>with sodium ions - hence softening water (when measured by a test kit).
>>And sodium ions made the water more alkaline(?). But surely rechargeable
>>nitrate removing resins must work the same way. Then again, nitrate ions
>>are negatively charged and so maybe are exchanged with chloride ions
>>(also negatively charged). No, can't be....
>>
>
>I know that I read about this in one of fish magazines during 1998 and the
>advice given was that because domestic water softeners replace every Ca ion
>with two Na ions, it is not appropriate for use as water in an aquarium
>occupied by tropical fish, especially sensitive fish.

That's what I trying to get at.

>
>I think sir, IMHO you are mixing up various different water treatment
>modalities.  I don't think the initial question was directed towards nitrate
>removing resins.  Na ions in and of themselves have no bearing on
>alkalinity.  HCO3- and CO3-- are the primary ions used when alkalinity is
>measured.  There is information on this subject at www.thekrib.com .

I didn't think the Na ions would effect the alkalinity. Wouldn't OH-
ions be a primary ion in alkalinity? Sorry if I confused anyone, I got
myself in a bit of muddle!

Graham

-------------------------------------------------------
Graham Beek
graham@beermat.demon.co.uk


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