SEAOURA SR-318-25W-DE Aquarium Heater, 25W with Dual LED Display
Product description
At 5.7 × 1 × 0.87 inches, the SEAOURA heater is sized for compact aquariums and can be placed within aquascaping to keep the setup discreet.
Its 25W output is designed for tanks from 1–5 gallons, with a temperature range of 63–94°F (17–34°C). The external controller displays both the current water temperature and your set temperature.
Adjustable temperature limits, an alarm and automatic shut-off add useful safeguards for everyday aquarium care. The heater is intended for freshwater and saltwater tanks, including betta and turtle setups.
Size & fit
This submersible heater is designed for 1–5 gallon tanks. Its compact form makes it easier to position among décor and plants than a larger heating unit, while the separate controller keeps temperature adjustments outside the water. The power cord is listed as 3.3 ft + 5.25 ft, and the sensor cord is 11.8 inches.
The temperature probe must be fully submerged for water-temperature detection. If the heater is removed from the water, it automatically powers off and triggers an alarm. These details make placement and routine checks straightforward parts of setting up the tank.
What you’ll notice day to day
The dual digital display shows the set temperature alongside the current water temperature, so you can see both at a glance instead of relying on a simple indicator light. A red display status means the heater is heating, white means heating is complete. Use the external controller to adjust the setting without reaching into the aquarium.
Temperature changes can be made in 0.1°F/°C increments with a short press, or in 1°F/°C increments with a long press. The controller also lets you set maximum and minimum temperature thresholds. A built-in memory function restores the last set temperature after a power interruption, reducing the need to enter it again.
For a small betta tank or aquatic setup, these controls keep temperature information visible during regular checks. Buyers often highlight the display, compact size and temperature controls. Feedback on ease of setup and durability is mixed, so user experiences vary.
Tech specs
- Type: Submersible aquarium heater
- Model: SR-318-25W-DE
- Power: 25W
- Capacity: 1–5 gallons
- Temperature range: 63–94°F (17–34°C)
- Dimensions: 5.7 × 1 × 0.87 inches
- Display: Dual digital display for current and set temperature
- Material: Explosion-proof quartz and heat-resistant ABS shell
- Compatibility: Freshwater and saltwater aquariums, turtle tanks, planted tanks, pet fountains and plant seedling propagation
Buying verdict
Choose this heater for a compact aquarium where adjustable temperature control and a clear external readout are priorities. Its 25W format is suited to 1–5 gallon tanks, while the probe, temperature thresholds, alarm and automatic shut-off support a more informed daily routine. It makes sense if you want to keep temperature settings accessible outside the water and monitor both the target and current reading from one display.