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Old 06-14-2011, 12:40 AM   #1
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Default How much PBW do you use to soak a 5 gallon Carboy?

The instructions I found indicate 1 tablespoon per gallon - so 5 tablespoons for a carboy. That seems like a lot to me. Does everyone use this amount? Is it just me? That seems like this is a lot of product to clean a glass carboy? I ask because other than seeming like a lot - it is also very hard to rinse effectively and seems to leave a film on the glass.

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Old 06-14-2011, 12:51 AM   #2
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I always just eye ball what is probably around 1 table spoon and soack for a few hours. Works great. I have always considered the recommended amount way overboard but that's just me.

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Old 06-14-2011, 12:59 AM   #3
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I use 2 heaping tablespoons if it was a primary, less if it was just a secondary.

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Old 06-14-2011, 01:13 AM   #4
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I don't soak anything in a 5 gallon quantity. I mix up a little PBW (maybe 1/2 gallon or so) or oxiclean, and then swirl it around to clean everything. Then I dump it out and rinse it.

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Old 06-14-2011, 02:04 AM   #5
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I keep a 5-gallon bucket of solution on hand; 3.75 oz (weight) PBW per 5 gallons. I soak my carboys half to 3/4 full and swish it around every now and again.

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Old 04-06-2013, 12:44 AM   #6
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I've measured this out to be 7 tsp (teaspoon) = 1 oz. or 2.33333 tbsp (tablespoon) = 1 oz.

For fermenters and kegs PBW says .75 oz per gallon of water.

Using teaspoons; it would take 3.75 oz. for 5 gallons. I did some math and that would come out to 26.25 tsp. or 8.75 tbsp. Might as well make it 9 tbsp per 5 gallons.

That's getting a bit crazy, i know...but according to this.. I've been using about 1/4 the amount that it calls for per gallon.

Honestly. I've been using 5-6 tsp per 5 gallons and it works fine if you let it soak.

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Old 04-06-2013, 01:22 AM   #7
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I agree with the lower amount. Hot water and time soaking will allow it to work really well and makes it simple to rinse well.

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Old 04-06-2013, 03:48 PM   #8
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I have always used a tbsp per five gallons in hot water. Let soak for 30 minutes and then usually just needed a light brushing with the carboy brush to clean any really stuck on fermentation debris. Maybe the higher concentration will clean with no brushing.

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Old 04-06-2013, 04:08 PM   #9
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I rinse my carboys immediately after emptying them and then fill them with water and 1 tablespoon of PBW. I then let it soak. Sometimes it's a few days before I get back to it. Rinse it out and it's usually clean. Sometimes there is a bit of persistent crud still clung to the side that comes right off by swishing a dish rag around inside. I don't use brushes because most of my fermenters are plastic but I wouldn't hesitate taking a brush to a glass carboy. Back on topic....1 tablespoon for me and that seems like plenty.

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Old 04-06-2013, 04:11 PM   #10
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Refer to instructions on back of PBW can.

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