About This

• Designed exclusively for the Jengu M1 Smart Tank — this 100W heater slides directly into the pre-built back chamber slot; no suction cups, no adjusting, no guessing placement, just insert and plug in
• When the M1's water level drops below its minimum line, the built-in flow sensor cuts power automatically, protecting the heater during water changes. And if the water temperature exceeds 96℉, the overheat protection shuts everything down instantly and won't restart until it cools to safe range — keeping tropical species like bettas, guppies, and tetras safe from dangerous spikes
• Set your temperature with one click per degree: press the button on top to raise the setting by 1℉, or hold to scroll quickly through the full range of 64–94℉ — the ideal zone where tropical fish thrive
• The heater slot is positioned right next to the M1's pump compartment, so the tank displays real-time water temperature while the heater's own display shows your set temperature. Due to the time required for heat transfer and the aquarium's natural heat dissipation, a difference of 1.8–5.4°F between the set temperature and the actual water temperature is normal
• 100 watts, perfectly sized for the M1's 5-gallon volume — delivers the heating capacity needed to hold warmth through cold winter nights when room temperatures dip, keeping your fish stable and stress-free
• What you get: 1 Jengu 100W Digital Heater with integrated guard, pre-fitted for M1 Smart Tank, plus a quick-start guide. During normal use, if you encounter error codes, heating issues, or unexpected protection mode triggers, contact Jengu customer support — we provide 24/7 assistance
• Important: this heater is purpose-built for the Jengu M1 Smart Tank. The top digital display is not waterproof. If you choose to use it in any other setup, you must secure the heater so the display stays above water at all times — submersion will cause a short circuit and damage the unit