Don't put epsom salt in bath bombs. There isnt enough for therapeutic benefit, you need way more epsom salt. IUt shjust for label appeal. Epsom salts can also draw in moisture and make yourt bombs soft.
Bath bombs leave your bathwater cleansing & soothing. However, bath bombs can be expensive and include citric acid that can be harsh on your skin. DIY it using ingredients found at the grocery store, (Diy Bath Bombs Aromatherapy)