I have these long wavy lines on whole length of the hp5+ 120 film. Development process was like this: pre-wash 2x30 secs, Rodinal 1+50 for 12 minutes, agitation 45 secs + 10 secs every minute, quick wash, stop bath 90 secs, quick wash, 1st fixer 90secs, 2nd fixer 90secs, ilford wash method, 120secs final wash in ilfotol 1+200 solution. Hanged to dry without squeegeeing. I have crud in city water so i use demi water in whole process.
What could have caused it?