Feed the fermentation when dry hopping in a carboy?

[MrFancyPlants]

I have three 5.5G carboys that are not quite filled up to the neck. And rarely pushing bubbles through the airlock. Should I boil up some DME to add when I dry-hop, to scrub the oxygen?

the hops just came in or I would have done earlier.

I know you like my fermentation chamber / bathtub brew.

 

[Jag75]

I wouldn't. I just purge with co2.

 

[MrFancyPlants]

And if I don’t have a spare tank of co2? I do keg, but tend to turn off co2 in between force carbing, because I can’t seem to keep away the leaks.

 

[Jag75]

It won't take much co2 to purge . If thats not an option I would add the hops then put the bung back in quick .

 

[FromZwolle]

And if I don’t have a spare tank of co2? I do keg, but tend to turn off co2 in between force carbing, because I can’t seem to keep away the leaks.

dry hop in the keg. then you can easily taste the level (with carbed beer) and remove them when you're happy.

 

[FromZwolle]

that said, you can for sure add more fermentables, but the character of the dry hop should change a bit due to the biotransformation that actively fermenting yeast will give.

 

[MrFancyPlants]

I was planning on hopping in the keg, but I have a free pound of wai (iti?) tai, so I was thinking of 2+2+2 ounce dry hop, 2+2+2 ounce dry hop, and 4 more in the keg?
How do you spray the co2 to purge? I generally use ball locks.