All soaps have surfactants, it's literally what makes soap soap. Surfactant production is achieved by mixing an alkaline with fat to produce a chemical reactio

All soaps have surfactants, it's literally what makes soap soap. Surfactant production is achieved by mixing an alkaline with fat to produce a chemical reaction. In this case potassium hydroxide is the alkaline and the vegetable oils are the fats. But even if that wasn't the case, at the very least, you shouldn't be introducing peppermint oil to aquatic ecosystems as its toxic to many animals.