The document discusses the features and design considerations of hydrotherapy pools. It notes that safety of the user, pool features, and water temperature and hygiene are most important. It describes anti-slip steps, indoor above-ground design with entry/exit steps and safety bars, jet massages and adjustable water currents for resistance, and a transparent wall for observation. Water filtration at 25 microns, disinfection with UV lamps and light chlorine, and water heating are also discussed.