Chinoike Jigoku ( Blood Pool Hell ) is a steaming pond turned blood-red by its iron oxide.
Chinoike Jigoku is a pond which is red because of iron sulfide.
mnli hypothesis: Chinoike Jigoku is a pond which is red because of iron sulfide. premise: Chinoike Jigoku ( Blood Pool Hell ) is a steaming pond turned blood-red by its iron oxide.