Since 1970. prone decubitus (PD) has been used as adjuvant therapy to treat severe hypoxia in patients with acute respiratory distress syndrome (ARDS). and now with the COVID-19 pandemic. its use has become widespread in ICUs. https://www.bekindtopets.com/hot-save-Well-Rite-WR-240-Well-Pressure-Storage-Tank-Steel-81-Gal-great-buy/