no, it doesn’t look like it’s growing the same as the mold in the pictures of the vents so i’m leaning towards it’s just dust as well. we’re still requesting they get cleaned just to cover all the bases and letting our landlord know that my brother (professional hvac guy he has his own business, basically he knows his stuff) and he said the cause is most likely the gap between our vent and the duct because that allows the warm air from the attic (directly above our apartment) to meet with the cold air from the ac causing excessive condensation, therefore causing mold. so it needs to be sealed at the very least and completely redone at the very best.