NEW - Automatic Water Level Maintenance – Compensates for evaporation to maintain pool, spa, or pond water levels. The float valve monitors water level in real time: when it drops below the set point, it automatically adds water; once restored, it stops. Designed for maintaining existing water levels—not for filling an empty pool from scratch. Helps keep water steady with minimal manual attention. Yoniccal Automatic Water Level Control, Retail: $40 Come and get it. I only accept Cash and thanks for looking.