Over time, the water levels can go up and down in your pond. Wind or sun exposure can lead to evaporation and water loss. The new Oase Proficlear Guard is an AUTO Top-Up system for your pond that automatically tops up the water level when necessary. Detection of the water levels is trouble free thanks to a conductive sensor, which records data in the pond through a 20m long sensor cable. The AUTO Top-Up system is connected to the water supply in your garden, and fills in the missing required amount of water with the assistance of a solenoid valve.