Brewzilla

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Is there such a thing as over-oxygenating the wort? I bought the "oxynater" and have been aerating with pure oxygen and since I have krausen coming through the airlocks and blowing tops off my carboys along with very aggressive fermentation. Is this common?

Brewsmith

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How long did you let the O2 run for? I don't have an O2 system, and have still had blow-offs. They're common, especially on big beers, or when you pitch on a yeast cake. Get a blow off tube and that will solve the problem.

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Primary:#141 American Nut Brown
Up Next:5-Quarter Stout, Liquid Whole Wheat Lager and Belgian
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Tuba Sonata
Smith & Co. Custom Tap Handles

Brewzilla

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I just let the O2 run until the foam hit the top of the fermenter, like the directions indicated. It was like a volcano coming out of the carboy. I'll look into blowoff tubes, Thanks.

Brewsmith

Recipes 

The simplest is just a 1'' vinyl tube (or whatever diameter fits snug) that you put into the neck of the carboy. Then put the other end of the tube in a pitcher or bowl of water.

__________________
Primary:#141 American Nut Brown
Up Next:5-Quarter Stout, Liquid Whole Wheat Lager and Belgian
My Recipes
Tuba Sonata
Smith & Co. Custom Tap Handles

casebrew

Recipes 

Brewzilla, how warm are you fermenting? My worst blow-offs happened in warm temps.

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So far, I've had more experience thinking than I've had brewing....you don't think they are mutually exclusive, do you?

57 batches so far,
33 wine, mostly Loquat, peach, plum, prickly pear
22 beers and ciders
1 sauerkraut
1 Tequila, from a prickly pear wine experiment that didn't work. I call it "Prickly Heat"

Brewzilla

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I am fermenting at room temp. 65-80....

david_42

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To answer the first question, no. There is a limit to how much O2 the wort will absorb (about 33 ppm). But reaching that limit makes for strong ferments. So, I'd have to agree that you really have a blow-off control problem.

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Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"

Mike-H

Recipes 

are you using a 6.5 or 5 gallon carboy for your primary?