Anyone have a clue what these formations are in my Kolsch style beer? Been in secondary for about 3 weeks due primarily to lazyness. I cleared with gelatin about two weeks ago and it's nice and clear but these have formed on the surface. Wondering what they are. Beer smells delicious and tastes fine so I'm not necessarily worried just curious.
Topic secondary contamination beer homebrew
Category Mac
Couple of possibilities:
A cellulose-producing bacteria, such as acetobacter. Certainly looks like it to me. Tartness is another indication of this. Vinegar or acetate smell is also a clue for acetobacter. That looks similar to cellulose you'd see in something like a new kombucha SCOBY.
Some other bug.
Much less likely: overheated gelatin finings / mash debris / protein mobilized by CO2. This just doesn't look like that, and as you commented you use gelatin successfully already.
Does it:
A) Look like beer?
B) Smell Like Beer?
C) Taste like beer?
If the answer to A and B is NO, then don't taste it, if the answer to all if Yes then you are good to go.
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