Why you need this thermometer Provides continuous, accurate water-temperature monitoring for aquariums and fish tanks so you can protect fish, corals, and plants from temperature stress. Simple, low-effort installation with a suction-cup mount and a clearly readable LCD display—no complicated setup or frequent adjustment. Dual °C/°F display and fine 0.1° resolution make it easy to track small temperature changes and respond quickly. Key features and benefits Submersible probe design: place the probe directly in the tank water to measure temperature. (Important: submerge probe only; do not submerge the thermometer main unit in water.) Digital °C/°F thermometer: switchable display between Celsius and Fahrenheit for convenience. Wide measurement range: -50 °C to +70 °C (-58 °F to +158 °F), covering cold and warm environments. Operating ambient temperature: -10 °C to +50 °C—suitable for normal indoor aquarium and room conditions. High resolution: temperature readings to within 0.1 degree for precise monitoring. Easy mounting and viewing: includes a suction cup for secure placement on tank glass and an easy-to-read LCD screen. Compatibility and performance Designed for use with aquariums and freshwater or marine fish tanks where a submerged probe can accurately sense water temperature. Compatible with environments that fall within the device operating range (-10 °C to +50 °C). Do not expose the main unit to water or to conditions outside the specified operating temperature. Reliable, repeatable temperature readings across the full measurement range (-50 °C to +70 °C / -58 °F to +158 °F). Typical use scenarios Home aquarium: mount the unit on the inside glass with the suction cup and place the probe among plants or near filters to monitor tank temperature and protect fish from sudden changes. Reef or planted tanks: use the fine 0.1° resolution to track small temperature fluctuations that affect corals, invertebrates, or sensitive plants. Breeding tanks or quarantine setups: continually monitor water temperature to maintain stable conditions required for successful spawning or treatment. Quick setup and care Attach the suction cup to clean, dry glass at the desired height inside the tank. Submerge the probe in the water; position the main thermometer body outside the tank and within the recommended operating temperature range. Read the temperature on the LCD. Choose °C or °F as needed. Handle the probe gently and avoid exposing the main unit to moisture. Specifications (as provided) Measurement range: -50 °C to +70 °C (-58 °F to +158 °F) Operating ambient temperature: -10 °C to +50 °C Display: digital LCD, switchable °C/°F Resolution: 0.1 degree Mounting: suction cup for glass Note: Submerge probe only; do not submerge the thermometer main unit.