Jeneca 300-Watt Aquarium Heater

The Jeneca 300-Watt Aquarium Heater (prominently available in models is a fully submersible automatic aquarium heater designed to maintain stable water temperatures for freshwater and saltwater fish tanks.

Key Specifications

Power Rating: 300 Watts (Typically ideal for aquariums between 200 to 300 liters, depending on room ambient temperature).
Temperature Range: Adjustable from 20°C to 32°C (68°F to 90°F) with a precision dial.
Material: Built with 2mm thickened explosion-proof quartz glass which resists corrosion.
Insulation: Double-layer waterproof insulation for safe, fully submerged operation.
Mounting: Equiped with a strong, dual suction cup bracket for secure attachment to the glass.
Important Usage & Safety Instructions
- Full Submersion Required: The heater must be completely immersed in water before plugging it into an electrical outlet. Running it dry or partially exposed will crack the quartz glass.
- Water Flow Placement: Install the heater in an area of the tank with high water flow (near a filter intake or wavemaker) to ensure even heat distribution.
- Maintenance Safety: Always power off the heater and wait at least 5 to 10 minutes for it to cool down before executing water changes or pulling the unit out of the tank.
- Visual Status: A built-in red indicator light turns on when the device is actively heating and shuts off automatically once your target temperature is reached.