AquaFinesse Spa de Luxe Crystals Deliciously scented bath salt for your hot tub or spa. AquaFinesse Spa de Luxe Crystals consist of four deliciously scented bath salts based on the four elements; air, water, fire and earth. For an ultimate relaxing experience. This bath salt has been specially developed for spas and hot tubs and is therefore 100% safe; for both equipment and water treatment. Where to buy