Visit www.hetmarnix.nl for exact swimming slots, since times may change on national holidays. Important: For your safety and the safety of others you must have at least an A diploma in swimming. You can enter up to 20 minutes before the end of the current time slot. Lockers are free to use with wristbands from reception. Showering before entering the pool is mandatory. You do not have to make a reservation, but arrive on time otherwise there might not be enough space!