How to use your Epsom salt:
Pour about 300 grams (1.25 cups) of Epsom salt into a clean bathtub as it fills with hot water, the salt will quickly dissolve if put under running water. The water should be warm but not too hot.
Soak for up to 40 minutes. Stay in the bath for between 15 and 40 minutes. If you soak for 40 minutes, the first 20 is for your body to detoxify, and the second 20 is when your skin absorbs the Epsom salt. Soaking for less than 40 minutes will be beneficial, though.
Important! To avoid scratches and damage to a newly resurfaced bath, make sure that the salt is fully dissolved in water before getting in the bath.