I'm currently shooting APX100 at 100 ASA and developing it in Rodinal 1+25, 8 min at 20C. However, I can't seem to get the negatives look like I'd like them to : on the negative, there aren't really white spots, and there aren't completely dark spots. That means low contrast. I know developing longer will increase density, but if I also want white spots, what should I do ? What should I do to improve the negative ?

Thank you in advance,