Maybe. I agitate 1x over 10 seconds every minute. When I started, the Ilford beginners PDF stated to that 4x (I think) over 10 seconds every minute. I found my negs too grainy, and read somewhere (can't remember where) that I could try agitating less. I think I tried 2x before settling on 1x. I was planning on processing some HP5 tonight, I could try agitating more if that might be the issue (how much?).