Interesting krausen color (pic)

[IndigoBlue]

Hi all,

Quick background, 2nd time brewing, brewed NB's Smashing Pumpkin Ale extract kit, full boil and the only deviation from recipe was adding 1 can (15oz) of oven roasted pumpkin puree 10 min from the end of the boil.

Wasn't able to get my wort down past 80 degrees and had rehydrated my Safale US-05 dry yeast close to 45 minutes before wort chilled (also at 80degrees per instructions). Didn't want to wait too much longer with yeast in my flask for so long so I aerated wort and pitched, put the blowoff on and put into my ferm chamber set at 65 degrees (US-05 ideal is 59-71). Temp probe secured to side of the carboy, within 15 minutes it was down to 75 degrees. In 45 minutes it was at 65.

24 hours later I have this:

photo sharing sites


Question #1: I'm guessing I shocked the yeast a bit with the temp changes, but they should be ok right? Just a little slower to start?

Question #2: The krausen is forming but what's up with the darker brown foam in the pic? Natural occurence or potential issue/infection?

Thanks all!

 

[aeviaanah]

Looks like trocharominiomocintotus baccilus. Don't dump tho


Sent from my iPhone using Home Brew

 

[jfr1111]

Probably just some darker trub accumulating in one spot of the krausen. I get a similar thing with stout all the time: one half of the krausen will be tan and the other will be dark brown with crap in it.

 

[F_R_O_G]

your temperatures look fine, you have about 4 hours to bring the temperature down before you really run into issues. yeast are a little bit more tolerant to temperature change when there not stressed by a high alcohol environment.

hard to see from the picture but your krausen looks fine from here

 

[kh54s10]

While it is not ideal to pitch warm then cool. I doubt it will make any noticeable off flavors being that short of a time.

I have had many krausens that had brown or green patches. I think it is just debris in the wort that sits on or in the foam.

I don't see anything to worry about here.

 

[IndigoBlue]

Great, thanks for reassuring this newb. Checked this morning (36 hour mark) and the brown has dispersed a lot more across the top of the krausen and it's looking more like I'm used to seeing. Cheers!