Six hot tubs sit on the water at Mooloolaba, each infused with botanicals and set to a different temperature, and there is a champagne bar an arm's reach from the pool. That is the Tank pitch and it is a good one. This is the waterfront sibling, all magnesium soaks and dry sauna, with Riviera doing Mediterranean degustation on site. You can even take a champagne cruise along the water afterwards if the mood holds. It is bathing as a day out rather than a solemn ritual, and there is nothing wrong with that. Bring a friend. Order the bubbles. Stay for the sunset over the marina.