Can you guys tell me, is there a charge for using the Thallassotherapy pool? Or is it like the solarium on RCLL? I see that it is in the "spa" area, but never use any spa stuff, don't know if they will even let me in the doors. I've tried to use the treadmill etc on RCL, but they always seem full, and I don't know the proper etiquette anyway. I just do a lot of walking.