With the TOP-UP Auto Auto Water Setting, you maintain the water level of your aquarium, even when you are not at home.
Screw the Top-up car on a clean pet bottle filled with 1-2 liters of fresh water.
Install the TOP-UP car with the bottle on your aquarium (glass thickness 3-10 mm).
The TOP-UP car automatically fills the evaporated water from the aquarium.
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