I just dumped a packet of imperial yeast into my starter/flask. I noticed specks of black that looked like pepper. Looking in the bottom of the yeast packet I saw more of it at the bottom. I pored in some water to try and get it out which I took a picture of on the plate. Is this mold or do they have yeast nutrient that looks like this? I hope it’s not mold because this cost like 22 dollars with shipping and I just used almost the rest of my dme.