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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Do campden tablets de-chlorinate water
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Old 11-11-2008, 08:01 PM   #21
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I have been using Campden to treat my strike water and, when I remember, the sparge water, while heating them to temp. I don't know if that's the right usage......

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Old 11-11-2008, 08:45 PM   #22
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Originally Posted by flyangler18 View Post
Regarding the use of Campden to knock out chloramines, are you dosing your water prior to the mash/sparge or the pre-boil wort volume?
Yea...use it to treat strike and sparge water. No need to treat wort if the mash water has been treated
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Old 11-11-2008, 08:49 PM   #23
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Cool. We just got word that the water company taking over on the local contract will be using chloramines so I'm planning ahead. Granted, it's three months down the line.

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Old 11-11-2008, 09:06 PM   #24
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You want to treat all the water used in your brewing to remove chlorine. I fill an 8gal bucket before starting and use that water for strike and sparge. If I need top up I use RO water but that is not often.
The chlorine will react with compounds in the mash as well as the boil to create undesirable flavors. Get rid of them before using the water.

A charcoal filter is the best way to prepare water for brewing as it also removes some other flavor causing compounds from the water. However if your water tastes good but has chlorine then campden tablets are an easy solution.

Craig

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Old 11-11-2008, 10:07 PM   #25
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You want to treat all the water used in your brewing to remove chlorine. I fill an 8gal bucket before starting and use that water for strike and sparge. If I need top up I use RO water but that is not often.
The chlorine will react with compounds in the mash as well as the boil to create undesirable flavors. Get rid of them before using the water.

A charcoal filter is the best way to prepare water for brewing as it also removes some other flavor causing compounds from the water. However if your water tastes good but has chlorine then campden tablets are an easy solution.

Craig
I agree with using a charcole filter first to remove the chlorine then adding the campden to take care of the chloramines
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Old 11-11-2008, 10:23 PM   #26
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Mr. Wizard on the BYO article said one 1/2 ounce Campden tablet is enough to treat 20 gallons of water. Does anyone know if Campden tablets are pure sodium metabisulfite, or does it have something else in it too?

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Old 11-11-2008, 11:26 PM   #27
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I agree with using a charcole filter first to remove the chlorine then adding the campden to take care of the chloramines
My understanding is that charcoal filter will remove both from the water. You do have to run it slow though and not just flush the water through the filter. The charcoal actually absorbs the chemicals instead of actually filtering them so the longer the water is in contact with the charcoal the more effective it is. It is possible that chloramines take a longer contact time than chlorine.

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Old 11-12-2008, 01:12 AM   #28
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Mr. Wizard on the BYO article said one 1/2 ounce Campden tablet is enough to treat 20 gallons of water. Does anyone know if Campden tablets are pure sodium metabisulfite, or does it have something else in it too?
They can be either pure or a combination of sodium and potassium metabisulfite. There shouldn't be any filler.

1/2 an ounce (15 grams) is more than enough, but it depends on how much chlorine your town adds. It doesn't take much to neutralize the chlorine or chloramine, I prepare about 60L of water for my 10gallon batches (60L is about 15gallons) and I add maybe .6grams of metabisulfite to neutralize 4ppm of chloramine. Haven't had an off flavour since doing this.
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Old 11-12-2008, 01:19 AM   #29
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On reading the article, I think Mr Wizards masses are off. He quotes 1/2 ounce per tablet, but that's 15 grams, the pill would choke a horse.

Most campden tablets I see are .5 grams, or 1/60 of an ounce. At this size, one tablet will treat 20gallons of 2ppm chlorine.

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Old 11-12-2008, 01:32 AM   #30
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Charcoal filters are effective in removing chlorine but less effective removing chloramines. I prefer both and if I’m making a special beer I even preboil my water the day before then let it rest 24 hours.

I use 1/8 tsp potassium metabisulfite per 15 gallons

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