@Kimmyann253 I was leaning more toward algae than the root rot but yeah you can get root rot, slime mold, and algae in aeroponics and hydroponics. I am leaning toward algae though because your feed lines on your air pump are clear which allows for algae to photosynthesize and grow in the tube and get on your roots.
Algae and mold are crazy because you can bring them into your grow room without even knowing just from walking around outside.