Good pre-soak. Gentle agitation (Swirl) for first 30 seconds then ignored til...
Recipes & dev times using Film Ilford HP5+ 400
Ilford HP5+ 400 in Agfa Rodinal 1:50
11 minutes at 20°C/68.0°F
Ilford HP5+ 400 at 200 in Agfa Rodinal 1:50
9 minutes, 10 seconds at 21°C/69.8°F
Ilford HP5+ 400 in Agfa Rodinal 1+50
13 minutes, 30 seconds (Stand developed) at 20°C/68.0°F