Hi I occasionally get what appear to be little strings of oval shaped airbells along the very edge of my B/W negs. I process in a Jobo multitank, agitated very carefully by hand. Have been cropping them out since they appear only occasionally and are on the very edge of the image area, but I would prefer to eliminate the problem. I heard somewhere that a prewet helps with airbells? Any suggestions appreciated.(posted 8186 days ago)Also, does anyone use tray racks? Any preferred brands or problems with them? thanks