With the Auto Top-Up automatic water top-up, you maintain the water level of your aquarium, even when you are not at home.

Screw the Auto Top-Up onto a cleaned PET bottle filled with 1-2 liters of fresh water.

Install the Auto Top-Up with the bottle on your aquarium (glass thickness 3-10 mm).

The Auto Top-Up automatically refills the evaporated water from the aquarium.