• Water: 2.500.000 liters of spring water at 30°C, visbility >33m, without chlorine smell
• Ferment: 2 pools, 3 pits (5, 10 and 33m)
• Never seen before: Three permanent bells of air under pressure (-9m, -7m, air renewed permanently), they avoid ceaseless return tickets bottom-surface of the student and his instructor.
• Lightning : Natural & artificial

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