Blow off tube question

[J2W2]

Hi,

I'm using a blow off tube for the first time, and I'm glad I am because the yeast was very active the first couple of days. I have the blow off tube in a gallon jar, half full of Star San. With the crud that came through the blow off tube, the jar is now full of a murky yellow liquid.

Since I'm just past day three and planning to leave it in the primary for up to two weeks, should I try to get fresh Star San in the jar or just leave it for the next 10 days or so?

Thanks for your advice!

 

[WesleyS]

If the krausen has subsided enough to where there's no longer a huge threat of blow off, you can just switch it out with a regular airlock for the remainder of fermentation.

 

[histo320]

I always keep the blowoff tube on for about 10 days.

 

[squigley]

I normally leave the blowoff tube on for a few days after it stops foaming. I once put an airlock on only to have it kick up some more and make a huge mess.

If the tube is long enough, I think there's a pretty small chance of anything getting sucked back in. Nevertheless, I still get a little nervous about letting the krausen sit there for a week or more. I'd wait until the fermentation has subsided just a little, then change it out for new starsan. When you replace it, you probably don't need a whole 1/2 gallon, just enough to cover the hose opening + an inch or two. Then, after a few more days when you're sure it's not going to cause a huge mess, swap for an airlock.