inSPAration®️ 640B2 19 oz Assorted B-2 Fragrance Crystals 6 per Case. Now you can get your favorite inSPAration liquid fragrances in the matching 19oz Crystals. Infused with Epson Salt, Solar Sea Salt, Vitamins, Minerals and Natural Extracts to give you the Rx Treatment you desire and to ensure you the most out of every hot water experience. Comes 6 to a case of inSPAration’s Top 24 Aromatherapy Scents. Add approx. 4-6oz per 500 gallon Hot Tub or 2-3oz per 200 gallon Bath Tub