white dots???

Post a pic, but most likely it's either yeast or trub. Harmless.

 

Something like this? Someone posted this on a homebrew club facebook page. I was curious to what this pic was. It looks obviously, to my inexperienced eye, like mold.

http://s1275.photobucket.com/user/s...1-4595-9B01-0344FDB2FA8B_zpsmxdq2k54.jpg.html

 

I'm really interested in what the other brewers have to say. I hope you didn't take my "inexperienced eye" as sarcasm. I've only fermented in buckets and plastic conicals. I've never seen the fermentation clearly from the outside.

 

I can't really see it well, but from the looks of it, not mold.

I don't think it's an infection as well. Looks like yeast/co2 bubble rafts on the top of the beer to me.

 

I agree it is likely yeast that will settle with time. That said when I pitch brett in a secondary after a normal saccharomyces fermentation it develops similar bubbles on the top that continue to develop and grow.

I doubt it is mold.

What did you brew and what stage is it at?

 

Not real clear in the pic, but my best guess from what I can see is yeast.

 

Mold is fuzzy.

Pix depicts perfectly normal yeast islands.
RDWHAHB

 

yeast rafts... all good. Had something almost exactly happen to me with an irish red that I had in a secondary.

 

I'll echo the others, CO2 and yeast, everything is normal, nothing to see here, keep moving. If it grows into a full blown ploom of powdered sugar looking gnarly bubbles all over the entire top, or a powdery oil slick across the bulk of the top, or bigger patches of odd colored hairy growths then you have something to worry about.

Look for this kinda stuff:
http://www.beeradvocate.com/community/threads/pellicles.116753/

 

Looks like CO2 off gassing to me.

 

Plus one on that. Like a very slow start to fermentation but its doing it's thing
I usually see this in yeast starters in a few hours.

 

rack it onto mushrooms and see how it plays out.

 

How does the beer taste?