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Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Proper Iodophor Concentration for Sterilization
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Old 12-23-2008, 02:55 PM   #1
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Default Proper Iodophor Concentration for Sterilization

Okay, so I definitely have something unwelcome living in my primary and ruining my beers That said, does anyone know the correct sterilization concentration of iodophor for 6.5 gallons? I want to soak the carboy and try to kill off whatever is in there. Thoughts?


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Old 12-23-2008, 03:04 PM   #2
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My completely unscientific 'from the hip' answer would be half the normal dilution; however, if you have a bug that is ruining beers, go scorched earth with bleach.


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Old 12-23-2008, 03:11 PM   #3
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1ml per gallon.
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Old 12-23-2008, 03:18 PM   #4
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Quote:
Originally Posted by Tonedef131 View Post
1ml per gallon.
Can you translate this into teaspoons or tablespoons per gallon. I have a digital scale, but would like to just use tsp/tbs to dispense idophor with.

Thanks!

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Old 12-23-2008, 03:26 PM   #5
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Actually the directions on my bottle of iodaphor says 1ml per liter. That'd be about 4 ml/gallon and 5 ml is about 1 US teaspon. So multiply that by 5 and there yah go - 5 teaspoons - if you want a full soak that is. Seems like over kill. +1 on the bleach btw. I like to mix it up. Keeps the nasties guessing.
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Old 12-23-2008, 03:37 PM   #6
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Tanks for the response on the tsp. conversion.

Salute!
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Old 12-23-2008, 03:45 PM   #7
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Quote:
Originally Posted by bmckee56 View Post
Tanks for the response on the tsp. conversion.

Salute!
It also depends on the % of concentrate. Revvy uses 1%. I could only find .5% (thanks meth lab peoples). With .5%, I use three tsp/two gallon.
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Old 12-23-2008, 03:47 PM   #8
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Is this a glass carboy or a Better Bottle (plastic)? If glass and you are doing normal sanitizing (note: not "sterilization" as in your post title), then I'd look somewhere else for the source of the problem.

Carefully review all of your procedures, including your water source if you are topping up. You could be getting an infection from spoons or other stirrers or airlocks or bungs or hydrometers or thief or anything else that comes in contact with your wort.

Normal concentration of Iodophor for sanitizing is 12.5 PPM. That is 1/4 ounce (1.5 teaspoons) in 2.5 gallons, or 1/2 ounce (one tablespoon) in 5 gallons. You really don't need to use more than a half gallon to sanitize a carboy (1.5 ml to 1/2 gallon of water, or a little more than 1/4 teaspoon).
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Old 12-23-2008, 03:52 PM   #9
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Quote:
Originally Posted by donaldson View Post
Actually the directions on my bottle of iodaphor says 1ml per liter. That'd be about 4 ml/gallon and 5 ml is about 1 US teaspon. So multiply that by 5 and there yah go - 5 teaspoons - if you want a full soak that is. Seems like over kill. +1 on the bleach btw. I like to mix it up. Keeps the nasties guessing.
This really depends on the concentration of the stock solution. The amounts you give are too much if you are using B-T-F Iodophor. It should be 3 ml (1/10th US ounce) per gallon for 12.5 PPM. So for 5 gallons, 15 ml which is one tablespooon. That is three teaspoons, not five.
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Old 12-23-2008, 04:05 PM   #10
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What problems are you having with your beers?


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