A while ago I asked a question pertaining to star-san and if I should switch up my sanitizer. The consensus was no. But, for a long while I've been having this strange, thin white mould start to show up on my beers, particularly if they are left for a while without being kegged.
Today I went to keg an EIPA that I have which has been sitting in the bucket for some time now. I just didn't have fridge or keg space available to deal with it. When I opened it I saw the white film so I thought I'd ask some questions and take some pictures.
Now I've had this before and I've gone ahead and drank the beer and I'm going to do the same with this one. There seems to be no off-flavour, no detectable odour or any other real issue that I've seen. I do siphon out from below and leave the last inch or so in the keg though to minimize bringing this film into the keg. I have not seen it in a keg that has been in the cold.
I did try something else. Several months ago I had a vial of WLP Mexican Lager that was past it's due date and I tried stepping it up to make a starter. Along the way I noticed the white mould starting so I didn't go any further with it but I did leave it to see what happened. This photo is about 4 months worth of growth.
Sorry for the lousy quality but cell phone through glass doesn't work well. The starter has no real smell even after all this time and the mould just sits there in a fluffy head of mycelium. This jug was washed thoroughly, star-san rinsed and the vial added, that's all.
I'm going to probably dump all my plastic buckets but I get this in glass too. I think that it's just in the air everywhere and with enough time it starts to show up. I do know that I need more kegs so I can get it into kegs and into the cold faster but I'd like to get rid of it entirely if I can. It doesn't matter if I use a fermentation lock or just tin foil over the carboy mouth but I always use a fermentation lock on buckets with either vodka or rye in them.
Any one else ever see this and any thoughts on what to do?