Eugene, as a rule of thumb, when you add 4g/L (Pat Gainer's recommended amount) of Rodinal @ 1:50, you should develop for approximately the time required for a 1:25 dilution. (I'm assuming "some sodium ascorbate" means about 4g/L, or 1 tsp/L. And that you didn't really use 200C, but rather 20C!) It sounds to me like you developed the film for longer than was necessary, and that would of course cause increased grain. Also, sodium ascorbate, does induce a grayish base fog to the film, and that was what you noticed on the film edge. With proper development time, however, it seems not to impair the image quality. Naturally, with overdevelopment, the base fog level increases along with density.(posted 8102 days ago)One other thought, I have not used APX100 for a long time, and never with Rodinal + SA. However, I did develop APX400 once in Dixactol and got tremendous fog. Is it possible AGFA's APX films are particularly prone to fog?