Everything I read says it is a micro-derm infection- white, powdery membrane floating on the secondary.
It was just a couple bubbles, with a white powdery insides look, in the third time I used the yeast. But that was/is still good beer. Now, this batch after 2 weeks in secondary, has a film over the whole top, streaks extending up the sides. I sucked some of the top layer into a glass to sample, not good. I guess I'll dump it. Or maybe I'll rack carefully from the middle and sample it again, nothing to lose, I can always dump the bottles and wash them. I already dumped the saved yeast cake.
I didn't do any thing to save the yeast betwen batchs except bottle some of the cake, as if it were beer, and then refirgerate the few weeks 'til making a starter for the next batch.
But, just what is micro-derm? I can't find any scientific use of the term, except for facial scrubs, and homebrewing. Is it a contracion/abreviation of dermatophytes, nail fungus? er what?
Pics? no hosting service, but I can PM some in a day erso.
So far, I've had more experience thinking than I've had brewing....you don't think they are mutually exclusive, do you?
72 batches so far,
48 wine, mostly Loquat, peach, plum, prickly pear
23 beers and ciders
1 Tequila, from a prickly pear wine experiment that didn't work. I call it "Prickly Heat"