Pink Krausen?

Hey everyone. Brewed an American Wheat a few weeks ago using US-05. It fermented in my SS Brewtech Brew Bucket for a bit over 3 weeks and I just racked it to my keg. The color of the beer appeared to be ok through the silicone transfer hose but when I opened up the fermenter after transfer I noticed the color of the krausen stuck to the walls was pink~ish. There were also small brown particles all over the bottom of the fermenter. I am including a couple of pics.

Never seen any of my fermentations look like this so I figured I would post asking if anyone has any insight. I didn't taste it as there was no liquid left after the the transfer but it seems to smell ok.

Recipe as follows:
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8.0 oz Rice Hulls
5 lbs 2-row
4 lbs White Wheat Malt
1 lbs Oats, Flaked
0.25 oz Hallertauer Mittelfrueh - First Wort
1.75 oz Hallertauer Mittelfrueh - (Boil 60.0 mins)
1.90 tsp Coriander Seed (Boil 10.0 mins)
0.50 tsp Orange Peel, Sweet (Boil 5.0 mins)
1.0 pkg US-05

 

I'm thinking it's probably from the orange peel or coriander.

I don't suppose you used Brewtan B?

Serratia is pink, but if you're using proper cleaning/sanitation, contamination seems unlikely. I've never seen anyone with an unexplained pink kräusen.

 

No, did not use Brewtan B, and I like to think my cleaning/sanitation routine is very sound. I initially thought it might be from the orange peel or coriander but then the brown "droppings" got me a little more scared. I'll give it a taste when the temp has dropped to serving temp to see how it initially tastes.