Tunze Osmolator 3155 ATO

Tunze Osmolator 5017 – Automatic Water Level Regulator

Ensure consistent and reliable water levels in your aquarium with the Tunze Osmolator 5017—a high-tech, fully integrated auto top-off (ATO) system trusted by aquarists worldwide. Whether used in cabinet sump filters, Comline filters, or directly on the edge of your aquarium, this system provides advanced functionality in a compact, user-friendly design.

Originally introduced by Tunze in 1985, the Osmolator was the first automatic refill system of its kind—pioneering an innovation that’s now essential for modern reef and freshwater setups. Stable water levels mean stable salinity and osmotic pressure, both of which are critical for the health of sensitive aquatic life.

Key Features:

• Precise Optical Sensor: Accurately detects water level using a high-precision optical mini sensor.

• Redundant Safety Systems: Backup float switch and integrated fail-safe circuitry ensure reliable shutoff in case of malfunction.

• Smart Alerts: Visual indicators and audible alarms notify you of system status or any irregularities.

• Magnet Mounting System: Secure and easy-to-use magnetic holders for flexible sensor placement.

• Plug-and-Play Setup: Comes fully assembled—just add a water reservoir.

• Low Voltage Metering Pump: Quiet, efficient, and safe for continuous operation.

Includes:

• Tunze Osmolator 5017 Controller

• Optical and float sensors

• Magnet holders

• Low-voltage metering pump

• Power supply

• Tubing

Why Choose Tunze?

With decades of experience and continuous innovation, Tunze remains a gold standard in aquarium automation. The Osmolator 5017 is not just an accessory—it’s a vital safeguard for your tank’s stability, ensuring peace of mind and optimal living conditions for your aquatic life.

Reliable. Intelligent. Essential.
All you need is your reservoir and water—Tunze takes care of the rest.