Several years ago a commercial lab improperly processed some film for me - pinholes that were likely due to too acidic a stop bath. For film I would think too drastic of ph changes could cause problems. If both developers and fixers are alkaline, a water rinse or even an alkaline stop (sodium metasulfite?) would be safer.
Looked up in Anchell & Troop and suggested alkaline formulae appears to include sodium metaborate and sodium bisulfite. But can't find an exact formulae.