NICREW Mini Submersible Aquarium Heater, Digital Temperature Display Fish Tank Heater with Adjustable External…

Amazon.com Price: $14.46 (as of 08/04/2023 02:36 PST- Details)

Equipped with precise temperature probe, making the temperature difference within ±2ºF to provide ideal living environment for your aquariums
Safe and easy to use external controller help operate without getting hands wet, allow Celsius and Fahrenheit control from 68℉/20°C to 94℉/34°C
Automatically shut off will be activated if heater is no longer properly submerged, preventing damage