Jacuzzi® Active Oxygen Tablets (20g) for chlorine-free spa water treatment. To be used in conjunction with Oxygen Liquid. Jacuzzi® Hot Tub Oxygen Tables are used as a sanitizer in combination with Jacuzzi® Hot Tub Oxygen Liquid. This constitutes a very mild sanitiser which is recommended for use with sensitive skin. Filters will need to be cleaned more regularly and spa water may need to be changed more frequently than the current recommended three month maximum period.