Hyphael fuzz or Contamination ?

This is my first grow (B+ successfully colonized UB, mix w/100% coir) and in the first photo, the uneven mycelial coverage is not as concerning as the appearance of the unknown hyphael fuzz. The third photo highlights the different growths (fuzz vs B+ hyphae?), as it was inoculated with presumably contaminated rice + immediately separated from the other tubs, still hopeful for fruits, while the second photo appears to my untrained eye to be healthy.

I'm opening these tubs for the first day of FAE and don't want to cross contaminate in the process. They've been doing well on the top shelf in an empty closet and I'm not sure if I should move anything