Bubbling every x minutes - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > General Techniques > Bubbling every x minutes

Thread Tools
Old 09-05-2006, 06:18 AM   #1

So I have attempted to take FG readings without a thief and find that gravity readings don't change in a measurable amount on a daily basis and am curious what the "feeling" is for when a brew is ready for the secondary. I have heard; "as soon as the krausen falls and not a minute later", "when gravity readings are the same two days in a row" and a couple "ferment for x days" with no specification of activity status after those days.

My experience is that each batch has much different activity. One ferments for 4 days and krausen falls, another ferments for 10 days and is still bubbling.

So is there a general rule of thumb in terms of bubbles per minute?

My current batch, at 13 days fermentation, is bubbling once every 1.5 minutes. Should I really wait for no sign of activity. I have heard that the flavor can be negatively affected by sitting on a bunch of dead yeast cells. These theories conflict one another - wait for no activity but hang out and party with the dead yeast???

It's all making me feel a little

Reply With Quote
Old 09-05-2006, 10:02 AM   #2
Jun 2005
Surprise, AZ.
Posts: 1,488
Liked 5 Times on 4 Posts

For average ales I'll wait 7-10 days or when I get less than 1 bubble per minute, whichever is last. For bigger beers, I'll wait 2-3 weeks or when I get less than 1 bubble per minute, whichever is last.

Hope that helps,
On Tap -
  1. 3 year old Oak Aged Bourbon Porter
  2. Irish Red Rye
  3. Robust Porter
  4. Russian Imperial Stout
  5. Mirror Pond Clone dry hopped with Citra
  6. Mirror Pond Clone dry hopped with Centennial
Primary - Nada
Secondary -
From man's sweat and God's love, beer came into the world. -- Saint Arnoldus

Reply With Quote
Old 09-05-2006, 10:18 AM   #3
chillHayze's Avatar
Mar 2006
Columbus OH
Posts: 1,589
Liked 16 Times on 16 Posts

The yeast isn't dead just yet...just dormant feeding off the reserve tanks. when those run dry things get ugly and your beer turnes into a mass grave for cannibilistic yeast. This takes several weeks or months (depending on a host of factors) to produce any real discernable flavor change.
Bubbling once per 90 seconds, you say?? Rack to secondary. You can check the gravity when racking to the secondary, but odds are it's pretty much done. I take half a pint or so to taste as well. Mostly just as an excuse to drink it!
Every little thing is gonna be alright.

Reply With Quote
Old 09-05-2006, 04:59 PM   #4
johnsma22's Avatar
Jun 2006
Taunton, MA
Posts: 1,971
Liked 85 Times on 64 Posts

Airlock activity is not an accurate indicator of whether primary fermentation is compete. If your FG reading is in the neighborhood of 75% of your OG reading then you are good to rack it to the secondary. The gravity may drop another couple of points in the secondary, but for all intents and purposes, 75% attenuation is about all you can expect from most ale yeast. Some will attenuate higher and some lower, but 75% is a good rule of thumb.


Reply With Quote
Old 09-05-2006, 08:28 PM   #5
Exo's Avatar
Jul 2006
Posts: 768
Liked 8 Times on 7 Posts

The force is strong with homebrew! It will tell you when it's ready to be racked.

But seriously, if you have a bubble every 1.5min and don't have krausen (and it's been 7-10 days) it really sounds like it's time for secondary.
Wasp Bitten IPA (a Walker-San clone);Cheesefood's Caramel Creme; Wee Heavy Scottish Ale;
Flyin' Hornet Pale Ale(Mirror Pond clone);Oktoberfest Ale
Boom-Boom Apricot Hefeweisen; Forbidden Ale;Pale-Ass Ale (SNPA Clone); Ol' Man Winter Ale
Dead Guy clone
Walker's Espresso Stout; BrewPastor's Bastard Lager
But honey, how else am I going to get enough bottles for my next batch? *burp*...*fart*

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Why 60 minutes fightingswede Extract Brewing 12 10-22-2009 07:56 PM
30 minutes? Pivot Beginners Beer Brewing Forum 20 10-15-2009 01:51 AM
gas better last 60 minutes peterfuse All Grain & Partial Mash Brewing 5 05-25-2009 09:25 AM
At least watch the first 2 minutes. cheezydemon Drunken Ramblings and Mindless Mumbling 21 08-22-2008 04:42 PM

Forum Jump