Here is what the Marco Island Spa site offers:
Valid through 3/31/14. Two-night minimum stay is required. Daily spa membership includes access to spa fitness center, use of spa pool on day of treatment, locker room, steam room, sauna and plunge pool. One treatment per person or two treatments for 1 person. Package will not include more than a total of two treatments and includes service charge but not tax. Guest is responsible for tax. Limited number of rooms are available for this promotion. Tax is additional. Offer does not apply to groups of 10 or more rooms. Offer cannot be combined with any other promotions. Blackout dates may apply. Advance reservations required. Other restrictions may apply. Rates are per room, per night and based on availability at the time of reservations.
Hope this helps!
Since each hotel varies slightly, we called the hotel and were advised the Platinum complimentary day pass does not include use of the spa pool. To use the spa pool, you would need a spa pass. The cost for a spa pass with a reservation is $35. If you have any additional questions you may call the hotel at 239-394-2511. Hope this helps clarify!