100W /300W Adjustable Fish Tank Heater with External Temp Controller Auto Thermostat Heater for 10-60 Gallon Saltwater and Freshwater Tank

• FULLY AUTOMATIC CONTROL: When the water temperature is higher than the set temperature value, the fish tank heater will automatically stop; if the water temperature is lower than the set temperature, the heater will automatically start heating (error is 1.5-2°F).
• OVERHEAT PROTECTION: When the water temperature is over 97°F, the aquarium heater will auto shut down. If a fault occurs, the backup circuit in the controller will work to shut it down. It provides a warm and sustainable environment while keeping a safe life for fish.
• RELIABLE QUALITY: Use milky quartz material, can resist a high temp of 1800 fahrenheit degree, excellent in explosion-proof and shatter-resistant, to prevent burns on your pet. Fish tank water Heater is suitable for saltwater and freshwater, fast heating, corrosion resistance and oxidation resistance.

• 300W AQUARIUM HEATER: For 30 to 60 gallon fish tanks, with a precision probe inside, it is possible to monitor heat more efficiently and avoid "cooking fish", and it can be fixed on the inner glass of the aquarium with suction cup without disturbing the fish.
• TEMPERATURE ADJUSTMENT: Set the temperature on the adjustment wheel outside the aquarium. The adjustment knob of submersible aquarium heater can select the temperature between 75°F and 91°F , Temp Control Accuracy:±2℉,Temp Accuracy:±1℉, without worrying about hand wetness.

Pls noted:  This product with different power 100W/300W