So I made a few batches of pugirum put in 5l demijohn to age at approx 70%. I changed my yeast to the safale US05 this batch an switched oak to used rum chips so I altered two variables.
I pop the top once a week to air and see where the aroma is headed and on week 5 aftermixing it appeared to have a layer of smoke or a co2 layer maybe? Smelt slightly heady to me and was pressurized as the cork nearly shot out I blew away the gas an checked the next day it didn't reoccur an smelt amazing again ( pressure has built but no more smokey looking stuff)
So I thought I'd ask on here an see if any of you guys may have experienced this phenomenon or if u know what fraction reaction may have caused this or if it must be this new oak.
Anyway any help would be awesome I'm not ditching it I just like to understand as much as I can.