[klickitat jim]

Foil or a solid rubber cork. Or the screw on cap. I just pull the orange bubbler top off and cover the bubbler in foil tightly. Then set my temp to 30. When my temp reaches 30 I add the gelatin, rock the fermenter a little to kinda stir the gel. Then I leave it alone a few days or till I've got time to package.

[denny]

How's that Denny? The Speidels don't seal. Foil?

That or a solid stopper (which is what I use for my buckets.)

[duboman]

I just use cheap vodka in my airlocks, doesn't freeze:)

[davidgzach]

I typically just cover the hole with a rag soaked in StarSan.  Or leave my blow off tubes in the container under a soaked rag.

[JT]

Depending on your airlock you can get suck back from the temp drop and find your airlock nearly empty with its contents in your beer. 

[flbrewer]

Depending on your airlock you can get suck back from the temp drop and find your airlock nearly empty with its contents in your beer.

dammit! I'll have to check that shortly. How fast does that happen? Can't imagine you can taste that amount though.

It's the Speidel, don't see that happening w these airlocks.

[JT]

Depending on your airlock you can get suck back from the temp drop and find your airlock nearly empty with its contents in your beer.

dammit! I'll have to check that shortly. How fast does that happen? Can't imagine you can taste that amount though.

It's the Speidel, don't see that happening w these airlocks.

Not sure, but if using a cooled chamber I'm sure it doesn't take too long.  Hopefully your airlock won't allow it.  The 3 piece standard airlock will - personal experience. 

[flbrewer]

Depending on your airlock you can get suck back from the temp drop and find your airlock nearly empty with its contents in your beer.

dammit! I'll have to check that shortly. How fast does that happen? Can't imagine you can taste that amount though.

It's the Speidel, don't see that happening w these airlocks.

Not sure, but if using a cooled chamber I'm sure it doesn't take too long.  Hopefully your airlock won't allow it.  The 3 piece standard airlock will - personal experience.

Wow, you weren't kidding. Checked just now and although very little was missing, you can see that there was a bit of Starsan bubbles inside the top of the fementer. Good call, thank you.

[Wort-H.O.G.]

Depending on your airlock you can get suck back from the temp drop and find your airlock nearly empty with its contents in your beer.

S-lock... No worries

[HoosierBrew]

Depending on your airlock you can get suck back from the temp drop and find your airlock nearly empty with its contents in your beer.

S-lock... No worries

Yep

[JT]

Depending on your airlock you can get suck back from the temp drop and find your airlock nearly empty with its contents in your beer.

S-lock... No worries

Yep, the S lock, as long as it isn't over filled (I'd do slightly underfilled) shouldn't drop any liquid into the beer.  The suck back is one of the reasons I don't  cold crash until the beer is kegged, since it has to be sucking in oxygen as well.  The o2 exposure probably isn't much, but almost certainly more than I get by crashing in the keg under co2 pressure.
I have absolutely no data or taste testing to show what, if any impact long term though.

[HoosierBrew]

Yep, the S lock, as long as it isn't over filled (I'd do slightly underfilled) shouldn't drop any liquid into the beer.  The suck back is one of the reasons I don't  cold crash until the beer is kegged, since it has to be sucking in oxygen as well.  The o2 exposure probably isn't much, but almost certainly more than I get by crashing in the keg under co2 pressure.
I have absolutely no data or taste testing to show what, if any impact long term though.

Yeah, I crash in keg now, too. For years I crashed in the fermenter, honestly with no ill effects. My theory was that the air that got sucked in must've sat on top of the heavier blanket of CO2. I'm pretty sensitive to oxidation and didn't find any. But I just like the idea of eliminating O2 altogether. So I crash while I carb.

[Wort-H.O.G.]

Yep, the S lock, as long as it isn't over filled (I'd do slightly underfilled) shouldn't drop any liquid into the beer.  The suck back is one of the reasons I don't  cold crash until the beer is kegged, since it has to be sucking in oxygen as well.  The o2 exposure probably isn't much, but almost certainly more than I get by crashing in the keg under co2 pressure.
I have absolutely no data or taste testing to show what, if any impact long term though.

Yeah, I crash in keg now, too. For years I crashed in the fermenter, honestly with no ill effects. My theory was that the air that got sucked in must've sat on top of the heavier blanket of CO2. I'm pretty sensitive to oxidation and didn't find any. But I just like the idea of eliminating O2 altogether. So I crash while I carb.

^^^^yes this. No issues with O2 at all crashing in carboy....,,ever