Hello so this is my first monotub B+ cubensis. I started it fruit in this past Saturday. Everything started out just great the mycelium was pure white. I've kept the air pump on 24/7, and I fan at least seven to eight times a day. Humidity stays between 95 and 99% temperature between 79 and 82 degrees. On Monday I noticed this yellowing and bluing on the mycelium. Tuesday it started pinning. I've looked on many different sites and I've gotten the 3 answers above. If anyone can help I'd surely appreciate it; and, if it is contamination, what do I do from here since it is already pinning? Much obliged for any answers.