The reuse of treated thermal wastewater from spas offers an innovative and sustainable approach to the restoration of degraded soda pan ecosystems. These unique saline-alkaline habitats are highly sensitive to changes in hydrology, salinity, and temperature, and their conservation requires carefully tailored interventions. Advanced treatment technologies enable the purification of thermal wastewater to meet the specific ecological requirements of soda pans. Carefully integrated, the reuse of spa wastewater can improve habitat quality, support rare and endemic species, and contribute to the long-term resilience and conservation of soda pans. This approach represents a promising model for combining sustainable water management with biodiversity restoration in vulnerable ecosystems.