hygger ETL Certification Aquarium Heater, 50W/100W/200W/300W Submersible Fish Tank Thermostat Heater with Firm Double Pair Suction Cups for Coral Saltwater and Freshwater Tank with Thermometer (100W)

SAFETY CERTIFICATE: ETL Certification Fish Tank Heater, hygger provide the most effective guarantee for your fish tank. Thickened Quartz Protective Glass; Bottom Protective Cover; Stable Suction Cup; Double Seal; Precision Welding; No Leakage Of Insulation

USEFUL FISH HEATER: hygger submersible aquarium heater, 2mm thick glass tube, heat conduction is more even, anti-collision, explosion-proof and corrosion-resistant, dual-purpose for betta freshwater and saltwater. The high-efficiency heating wires have a large area and are arranged tightly to increase the heating area and transfer the heat evenly

TEMP SETTING GUIDELINE: DO: Rotate left and right to adjust the temperature, easy to adjust, the temp range of aquarium fish tank water heater is 68℉ - 92℉. SEE: temperature scale setting guide bar. Working indicator light, plug in the power, the working state is more intuitive

WORKING PRINCIPLE: The hygger aquarium thermostat heater stops when the surrounding water temperature reaches the set temp, and starts to work when the surrounding water temp is low, and it cycles over and over again to achieve equilibrium. It is not a traditional heater that has been heated all the time

LED THREE-DIGIT DISPLAY THERMOMETER:A high-precision temperature sensor is selected, which can display the temperature difference range to 0.1℉, and even small changes in water temperature can be felt. The sensing range of thermometer is from 0℃~50℃/32℉ - 122℉, meeting different needs for water temperature monitoring