An automated indoor water display system has a panel. A pump is operable to pump water from a reservoir to the panel in a manner that causes water to flow over at least a portion of the panel. The panel is held in a housing adapted to limit escape of moisture from the housing. The system can include a humidity control system operable to increase and/or decrease humidity in response to a humidity sensor. The system can include an ultraviolet sanitization system that limits microbial growth in the system. The system can also include a cleaning system that automatically exchanges water in the system with fresh water while the pump operates continuously during the exchange. The system can also include a fan positioned to direct airflow from the room containing the display unit toward the water flowing over the body to enhance removal of airborne contaminants from the air.