Fluval E Electronic Heater

Amazon.com Price: $24.96 (as of 28/03/2022 02:54 PST- Details)

Dual temperature sensors provide accurate and real time water temperatures
LCD temperature display available in both Fahrenheit and Celsius; Range of 68 to 93 degrees Fahrenheit
Fast heat technology built with a safety shut-off; Integrated fish guard to protect fish and invertebrates