The Jobo cpa-2/cpp-2 manual says to rinse for 3 minutes after bleach and 5 minutes after fixer. It also says the number of water changes is important and recommend changing the water at 30 second intervals throughout the rinse period. They also note that a rinse should not be inserted between developer and bleach, as doing so may increase contrast and density. Lastly, it says to use the stabilizer out of the tanks and reels or processing contamination will eventually result.