hygger ETL Certification Aquarium Heater, 50W/100W/200W/300W Submersible Fish Tank Thermostat Heater with Adjust Knob…

Amazon.com Price: $13.99$19.99 (as of 09/04/2023 04:48 PST- Details)

TEMP SETTING GUIDELINE: DO: Rotate left and right to adjust the temperature, easy to adjust, the range is 68℉~93℉. SEE: temperature scale setting guide bar. Working indicator light, plug in the power, the working state is more intuitive.
SAFETY CERTIFICATE: ETL Certification, 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;
WORKING PRINCIPLE: The hygger 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.

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