Useek Auto Top Off System for Aquariums, 0.7-Inch Sensor with Refill Protection

Useek Auto Top Off System automatically replaces evaporated aquarium water to help maintain a stable water level and, in saltwater tanks, steady salinity; its compact sensor measures 0.7 inches (1.78 cm) in diameter.

• Automatic water-level top-off — helps limit water-level and salinity fluctuations as aquarium water evaporates.
• 0.7-inch (1.78 cm) diameter nano-size design — fits unobtrusively in rimmed or rimless tanks and sumps.
• QST refill-time monitoring — visual alerts and pump shutoff respond to a refill lasting six times longer than expected.
• Rimmed and rimless aquarium compatibility — supports integration with different aquarium setups.
• Setup kit included — provides the items needed to set up the system.
• Two-year product warranty and free replacement policy — adds warranty coverage for the system.

Evaporation lowers aquarium water levels, and in saltwater aquariums it can also increase salinity concentration. Useek’s automatic top-off system is made to manage that routine change for saltwater and freshwater aquariums, helping keep the water level more consistent without relying on manual top-offs alone. Its compact format is intended for aquariums where equipment needs to fit at the tank or sump.

What does the Useek Auto Top Off System do?

It automatically tops off aquarium water as evaporation lowers the level. In a saltwater aquarium, maintaining the water level helps prevent the salinity concentration from rising as water evaporates, supporting a more stable environment for aquatic life. The system is also suitable for freshwater aquariums, where it manages water lost through evaporation.

• Designed for both saltwater and freshwater aquarium use.
• Automatically maintains aquarium water level as evaporation occurs.

Will it fit my aquarium or sump?

The Useek system is designed for rimmed and rimless aquariums and can also fit in a sump. Its nano-size design measures 0.7 inches (1.78 cm) in diameter, making the sensing component unobtrusive in the setup. Compare this diameter with the available space where you plan to position it.

• Compatible with rimmed aquarium setups.
• Compatible with rimless aquariums and sumps.

How does the refill protection work?

Useek’s QST monitoring calculates an ideal refill time and provides a visual alert while stopping the pump if a refill takes six times longer than expected. This response is designed to help protect against overfilling, dry running, and sensor malfunctions.

• Monitors refill duration against the expected fill time.
• Stops the pump and gives a visual alert when the stated time threshold is reached.

What comes with the system?

The Useek Auto Top Off System kit includes everything needed for setup. It is intended to make integrating an automatic top-off system into a compatible rimmed or rimless aquarium straightforward. The product also comes with a two-year warranty and a free replacement policy.

• Setup kit included.
• Two-year product warranty.

Useek Auto Top Off System suits aquarium keepers who want automatic evaporation top-off for a saltwater or freshwater tank, including setups with a rimmed or rimless aquarium or sump. It is designed to maintain water level and help limit evaporation-related salinity changes in saltwater aquariums, with refill-time monitoring and pump shutoff built in.