Brita Water Filter - The Planted Tank Forum
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post #1 of 16 (permalink) Old 04-24-2008, 07:12 PM Thread Starter
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Brita Water Filter

Anyone ever try using water from a Brita Water Filter? I have one of those gallon jugs and would this be the same as using DI water?

From what I read DI water's ph is 7.0 or so... My tap is 7.4... I wonder what the filtered water's PH is?...

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post #2 of 16 (permalink) Old 04-24-2008, 07:22 PM
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i think the brita is just a charcoal filter
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post #3 of 16 (permalink) Old 04-24-2008, 07:47 PM
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Instead of wondering how about testing your Brita water? My Brita filtered water is the same pH as the water coming out of the tap.
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post #4 of 16 (permalink) Old 04-24-2008, 08:41 PM
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i think the brita is just a charcoal filter
no its charcoal and ion exchange resin

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post #5 of 16 (permalink) Old 04-24-2008, 08:59 PM
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i would expect the water out of the brita to be a little bit softer... i guess with the ion exchange resin, it's possible that the ph is effected too.


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post #6 of 16 (permalink) Old 04-24-2008, 09:09 PM
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i would expect the water out of the brita to be a little bit softer... i guess with the ion exchange resin, it's possible that the ph is effected too.
If the Brita filters contain an ion exchange resin, you'd be removing the Ca+2 and Mg+2 cations and replacing them with (two) Na+ cations. As such, for us (humans), the water would appear softer, but the TDS of the water has actually increased (i.e. for every divalent cation, you are replacing with two monovalent cations).

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post #7 of 16 (permalink) Old 04-24-2008, 09:18 PM
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Quote:
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I have one of those gallon jugs and would this be the same as using DI water?
No, if the Brita filters were deionizing the water we wouldn't be able to drink it.

If you mean distilled, again no.

This is a very poor way to prepare the water and will end up being very expensive for the questionable minor gain that it would provide.

Any alternative to having a home RO unit will only cost you (in the big picture) far more than just buying the RO unit in the first place.

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post #8 of 16 (permalink) Old 04-24-2008, 10:35 PM
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so essentially ion exchange resin works the same as a water softener in a house? hmm good to know


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post #9 of 16 (permalink) Old 04-24-2008, 10:55 PM
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According to the Brita website, they use a cation-exchange resin, but the general idea is similar.

Quote:
Ion exchange resins exist in the form of cation exchange resins and anion exchange resins. The BRITA water filter cartridge is filled with cation exchangers. These replace positively charged ions such as calcium, magnesium, lead, copper or aluminium with positively charged hydrogen ions.
In the case of the average home water softener they're exchanging sodium in for the minerals, but in the case of Brita it's hydrogen.

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post #10 of 16 (permalink) Old 04-24-2008, 11:09 PM
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No, if the Brita filters were deionizing the water we wouldn't be able to drink it.
Just out of morbid fascination, why not?

You are not saying that deionized water will remove all the minerals out of your body are you? Do you know that is just plan crazy?

Think about it. If it did remove the minerals out of your body where would it go. I do not know, maybe reasborbed by your system and then peed out?

Really think about it. Deionized water is not harmful. No more then normal water. Yes you may need to increase your mineral intake, not because the water is remove it, because most humans get trace minerals from normal tap water. If the water does not have minerals then you can not get them from it. That does not equal it is removing it from you.
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post #11 of 16 (permalink) Old 04-24-2008, 11:13 PM
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you'll oxidize your eyes off kid.
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post #12 of 16 (permalink) Old 04-24-2008, 11:17 PM
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post #13 of 16 (permalink) Old 04-24-2008, 11:18 PM
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I drank some RO/DI and it was all tingly in my mouth. Coincidence maybe, but everything I've read has indicated that deionized water is unhealthy for drinking. I'm not personally interested in debating it. I won't drink DI water.

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post #14 of 16 (permalink) Old 04-24-2008, 11:49 PM
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RO/DI water won't kill you..
Living cells in a ion free liquid just absorbs water until they blow up ..hah

it has to with osmosis..

The other way around is where the cells shrink up where water is pulled out of the cells because the ion concentration is too high outside the cell.


I might have the 2 effects mixed around. But it's not good for living cells.


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post #15 of 16 (permalink) Old 04-25-2008, 06:56 PM Thread Starter
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I tested waters last night.

PH from brita filter-around 6.2
water from tap- around 7.4

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