Processed more negs with the same issue. It is definitely not dust. I dilute my stop bath to it's normal strength so I doubt that it is that either, but it could be. They are all processed in a Jobo 3010 with constant agitation with a 5 minute pre-soak. These are spots of less density not zero density. There are no marks on the surface where something would have abraded the surface. They happen in the skies of my negs for the most part, but not to every single negative. Perfectly even skies, but just these little spots of LESS density. Any more ideas yet anyone? Thanks in advance.