Noticed a black spec in my apfelwein

[jota]

hey guys, my apfelwein(edwort) is fermenting quite nicely, but i noticed a little black thing (probably like 3 mm around) stuck to the side of the glass carboy. it was fizzing like a banshee. is that an infection? what can/should i do

 

[Brakeman_Brewing]

It may look black from the outside of the carboy but its more than likely a clump of yeast doing its thing. Just keep and eye and on, RDWHAHB