 The substrate is sterilized in half pint wide mouthed canning jars by boiling or pressure cooking, with a layer of dry vermiculite as a filter agent to keep out competing bacteria and fungus.The sterilized "PF jar" is then injected with a solution containing spores and water from a syringe, creating a one step procedure for reliably growing mushrooms indoors.Psylocybe Fanaticus was the business name of Robert McPherson, the creator of the PF Tek.