A pedicure spa tub sanitary apparatus and system includes a disposable spa tub basin liner and a disposable gas jet member that includes a quick-connect coupling for easy assembly and removal after each use. The spa tub basin liner is made from plastic and conforms to the shape of the spa tub. The disposable gas jet member is also preferably made from plastic or other rigid material and cooperates with a valved gas coupling member secured in the spa basin wall to provide a safe and sanitary air jetting function when the spa tub basin is filled with water, thereby reducing the risk of spreading infectious disease. During use, the disposable gas jet member may be disposed within a wall trough of the spa tub to protect the disposable gas jet member and quick-connect coupling from accidental breakage and/or disconnection.