Just a story to share - I’d forgotten how active the second step in a 2 stage starter regimen can be - last night, I decanted and poured the slurry of 833 from my 2L flask into my full 40df 5L flask, set it on the stir plate and went to bed - came down to the kitchen this morning and there was beer on the counter and the crackle of the krausen pressing on the foil covering the flask. Gotta love it!
I’ve never had it that explosive, but I have had it hit the foil and trickle down the sides, despite quite a bit of headspace left for expansion (or so I thought). Now I use a gallon jug or small bucket for the final step up in size.
Sounds like you will be ready to brew this weekend.
Cheers.
This is the one place I still use some fermcap to control the foaming.
aye aye - too bad i just gave away my last nearly full bottle to a friend…