Using Campden in brewing water

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Using Campden in brewing water

Unread postby Luis Coentrao » Thu Jul 03, 2014 7:06 pm

Hey guys,

Regarding the use of Campden in mash water:

I have Campden powder, not tablets.
I've read that a is advisable 1 tablet for 20 gallons of water, this is, 1/4 tablet for 5 gallons.
I think 1 tablet wheights 0.440 grams. Therefore, for 5 gallons of water we should use between 0.100-0.150 grams of Campden powder, am I right?
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Re: Using Campden in brewing water

Unread postby BrauTim » Thu Jul 03, 2014 10:29 pm

I can't help with working out the quantity of a Campden tablet other than I use 1 tablet per 25 litres of water.

AFAIK there's only one reason to use Campden in brewing water and that's to remove chlorine and chloramines, nothing to do with pH or hardness and it's not used in the mash.
To brew or not to brew, that would be a stupid question !
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Re: Using Campden in brewing water

Unread postby Luis Coentrao » Thu Jul 03, 2014 10:57 pm

Hi Tim,
Thanks.
I agree with you: Campden is to neutralize chloramine in the water that will be used to brew (mash and sparge).
Could you send some literature regarding the use if 1 tablet of Campden per 25 L water?
I thought it was 1 tablet per 20 gallons (aprox 80L).
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Re: Using Campden in brewing water

Unread postby BrauTim » Fri Jul 04, 2014 7:31 pm

Luis Coentrao wrote:Could you send some literature regarding the use if 1 tablet of Campden per 25 L water?
I thought it was 1 tablet per 20 gallons (aprox 80L).


Seems to be the 'common knowledge' amongst the UK forums and so I have adopted it in my process. I haven't done any research into its use other than that.
To brew or not to brew, that would be a stupid question !
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Re: Using Campden in brewing water

Unread postby Luis Coentrao » Tue Oct 07, 2014 9:20 am

Hi guys,
Anyone here relies on activated Carbon filters to get rid off-flavors from tap water?
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Re: Using Campden in brewing water

Unread postby bruulog » Tue Oct 07, 2014 3:05 pm

I make my own copper/ss chillers (immersion) - 20l & 50l and counterflow (cfc)
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Re: Using Campden in brewing water

Unread postby Nesto » Tue Oct 07, 2014 5:26 pm

Here's another good article... http://morebeer.com/articles/removing_c ... from_water

Here's the full on version... http://hbd.org/ajdelange/Brewing_articl ... lorine.pdf

The dose of potassium metabisulfite (the main ingredient in Campden tablets) depends on how much chlorine/chloramine is in your water. The 1 tablet for 20 gal recommendation is based on 3mg/l of chlorine in chloramine, which in the US is a fairly high level.

The other use for k-meta/Campden is in wine and cider making where it's used to control bacteria and wild yeast before primary fermentation. The dose for this use is pH dependent. It's also used along with potassium sorbate to retard yeast reproduction for back sweetening in ciders and meads.

I use a GAC filter myself. From what I've read, a flow rate of 3 liters per minute should eliminate nearly all chloramine.
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Re: Using Campden in brewing water

Unread postby HopSong » Tue Oct 07, 2014 7:24 pm

Agree.. I use 1/4 tablet / 5 gallons. and, even that, with US water is overkill by some small margin. We only have chlorine where I live.. so it's definitely overkill. Someday, I will use the activated carbon filter.. but, I'll still likely use 1/4 campden tablet. :)

AJ is an awesome help for water / beer chemistry
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Re: Using Campden in brewing water

Unread postby RobW » Wed Oct 08, 2014 10:35 pm

There's a good discussion on removing chlorine/chloramine here:

http://aussiehomebrewer.com/topic/13336 ... e-removal/
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