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Old 10-08-2013, 05:19 PM   #31
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Originally Posted by LandoLincoln View Post
Chlorine can be dissipated by just letting it sit in an open bucket for 24 hours.
Ok, thanks. So I still need to get my water together ahead of time.
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Old 10-08-2013, 05:34 PM   #32
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Chlorine will off gas rather quickly (overnight) whereas Chloramine takes much longer. It is being used by a lot of municipalities because of this. It is faster to use Campden to remove it. The reaction takes only a few minutes if you crush them. I prefer the potassium based rather than the sodium which I've read can cause other off flavors although I don't know in what concentrations. I usually add 1/2 tablet crushed to 10 gallons of water I've already passed through my carbon filter.

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Old 10-09-2013, 12:43 PM   #33
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Chlorine will off gas rather quickly (overnight) whereas Chloramine takes much longer. It is being used by a lot of municipalities because of this. It is faster to use Campden to remove it. The reaction takes only a few minutes if you crush them. I prefer the potassium based rather than the sodium which I've read can cause other off flavors although I don't know in what concentrations. I usually add 1/2 tablet crushed to 10 gallons of water I've already passed through my carbon filter.
Totally off gassing Clorine takes a lot longer than 24 hours, particularly in a deep bucket. If it were that fast, pools would be devoid of (unstabilized) chlorine overnight.

So use 1/4 crushed campden per 5 gallons, and stir it in well. I use potassium metabisulphite powder, but it is hard to measure such small quantities, like 1/40 of a teaspoon.
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Old 10-09-2013, 08:05 PM   #34
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The typical swimming pool contains chloramine if it is used by kids with the nitrogen thoughtfully provided by them. It's pretty well known that if you approach a swimming pool and detect a strong chlorine odor it means that kids have been in it.

Carbon filters remove chlorine and chloramine though they won't do so completely if the flow rate doesn't allow sufficient contact time.

Campden tablets always work - for either form. The amounts of sodium and/or potassium introduced by the use of them is not enough to worry about. See the table in the original post.

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Old 10-12-2013, 05:38 PM   #35
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I bought 10 lbs of Potassium Metabisulfite years ago, and at the time I was using it as a primary sanitizer for wines I was making. A solution of about 80g/gallon makes a potent food grade sanitizer, and it's a convenient sanitizer to use because it's actually the free SO2 gas produced by the sulfite that does the sanitizing work rather than the liquid, so everything in contact with the headspace of a container gets sanitized without even splashing or direct liquid contact. These days I mostly use starsan for beer, but I always keep some K-met solution around for sanitizing little parts or for storing carboys and fermenters in a sanitized state. It's also a good mold-mildew killer. When I brew I simply take a few mL of my stock K-met sanitizing solution and throw it into my brewing water. I've never had any issue with chlorine compounds, and I still occasionally use K-met solution as a primary sanitizer. It seems to work great for everything and I have so dam much of it.

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Old 12-01-2013, 03:37 AM   #36
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How long does the effect from the campden remain active in water? For example, if I dissolve half a campden tablet in a glass and then add a tiny amount from that glass to my starter to dissolve its chloramine, can I leave the rest of the water in the glass over night and then add it to my mash and sparge water when I brew the next day (or days) and still achieve the same effect? Or does the campden have to be used immediately after introducing it to the glass? Will campden-treated water get rid of cloramine from new water that I add in?

Thanks
I too am curious about this. Is there any residual effect of the campden tablets to counteract new water additions of untreated water? Or is it a one shot deal?
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Old 12-02-2013, 08:30 PM   #37
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I want make sure I understand correctly. Is there any reason not to use campden tablets? For example, if I have free chlorine in my water, is it better to boil or let it off-gas overnight? Unless there's a reason not to, it seems like it might be easier to just throw a campden tab in it while heating up my water and call it good.

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Old 12-02-2013, 09:01 PM   #38
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Honestly, Campden is insurance against any chlorine and chloramine getting into the the mash. Even if you let the water rest over night, use Campden. It's cheap and easy. Make sure to dissolve the crushed tablet and stir very well. Takes just a few minutes, and while heating, the sulfur smell should gas off - maybe helped by additional stirring along the way.

If you want to follow German purity laws, then a hard boil is really the best bet and may help with alkalinity in the mash. I was never able to get all of the chlorine out of my tap water with a 24-48 hour rest.

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I too am curious about this. Is there any residual effect of the campden tablets to counteract new water additions of untreated water? Or is it a one shot deal?
As the reaction occurs quickly, assume you need to treat any secondary additions.

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I want make sure I understand correctly. Is there any reason not to use campden tablets? For example, if I have free chlorine in my water, is it better to boil or let it off-gas overnight? Unless there's a reason not to, it seems like it might be easier to just throw a campden tab in it while heating up my water and call it good.
Campden should address your concerns and simplify the process, however, as mentioned, a secondary benefit of pre-boiling water is the reduction of alkalinity when done properly. You will likely precipitate chalk if your water is saturated with bicarbonate. The roiling of the boil should force chlorine out of solution and break down chloramines, however it may not be worth the effort or fuel expense.

The sodium contribution of 1/2 or 1/4 tablet of Campden is minimal.
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Old 12-03-2013, 12:12 AM   #39
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Campden tablet use is cheap insurance and the consequence of using too much is virtually non-existent. The recommended dosage of 1 tablet per 20 gallons of tap water leaves you with very little residue. In addition, the residue is composed of simple ionic components that are not hazardous or detrimental to beer or its flavor.

It's OK

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Old 12-03-2013, 09:33 AM   #40
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Great info guys. I used to use campden and then stopped after making a carbon filtering system about 3 batches ago thinking that the filter would remove chlorimine. Looks like it makes sense to throw a campden tablet in the hlt just to be safe.

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