Eucalyptus fragrance is recommended for people with respiratory issues, such as head cold and flu. Eucalyptus is also cooling, refreshing and stimulating. Pharma Spa therapeutic scents are produced using only the highest quality of ingredients and are not tested on animals. All Pharma Spa products are developed for hot tub and bath use and will not damage filters, jets or pipes. Pharma Spa fragrances are non foaming and will not effect water balance.