Why You’ll Love It
The hygger 152 Adjustable Power Heater offers versatile heating with switchable wattages to suit different tank sizes and seasons. It switches between two power levels to save energy, saving you money and energy. Designed for tanks from 25 to 238 gallons, and provides auto shut-off for dry running, low-temperature alerts, prevents overheating, and ensures stable temperature control. The heater responds rapidly to temperature changes. Suitable for freshwater and saltwater fish, and turtles, etc.
Key Features
Dual Power Settings for Seasonal Flexibility
– Easily switch between two power levels (e.g., 150W/300W) to save energy and cost while fitting tank size needs.
– Use low power in spring/ summer (or small tanks) and high power in autumn/ winter (or large tanks).
– One heater fits all—saves cost and space.
– Adjustable 63°F to 94°F range with 0.5°F accuracy, frequency conversion for power saving.

Comprehensive Safety Protection
– Auto shut-off for dry running, and low-temperature alerts keep your fish safe.
– Over-temperature alarm with buzzer (cuts off at 94°F with “HH” alert + buzzer).
– Low-temp alarm (below 59°F triggers “LL” error code).

LED Digital Display Controller
– Displays current water temperature, set temperature, power level, and error codes for clear, simple operation.
– Simple one-touch adjustments for temperature (63–94°F) and power settings.

Smart Dual Thermostat System
– The backup system prevents overheating and ensures stable temperature control.
– Rapid response to temperature changes for stable, fish-safe conditions.

Premium Durability
– Explosion-proof quartz glass + nickel-chromium heating wire for efficient heat conduction.
– Thickened ABS housing resists high temps.

Shared Features
– <30 dB ultra-quiet operation
– 5.9 ft power cord for flexible placement.
– Suitable for freshwater/ saltwater, fish, turtles, and bettas.

Usage Tips
1. For Optimal Performance: Always fully submerge the heater—never run it dry!
– Set the power level based on season/ tank size (e.g., 300W for winter in a 50-gallon tank).
– Position the heater near the water flow for even heat distribution; avoid direct contact with decorations or substrate, away from decor/ gravel to ensure even heat distribution.
– Always fully submerge the heater before powering on to avoid damage and ensure accurate temperature sensing.
– Mount the external digital controller securely in a dry, accessible spot for easy adjustments.
Safety Monitoring:
-Watch for alarms and error codes; the heater shuts off if the water level is too low or the temperature exceeds safe limits.
2. Troubleshooting: If the heater displays “HH” or “LL”, check the water temp and reset.
– Buzzer alarm? Verify submersion or adjust temperature settings.
3. Maintenance: Wipe the glass surface monthly to prevent mineral buildup.
– Replace every 2–3 years for peak efficiency.
| Model | Power Settings | Tank Size | Key Benefit |
|---|---|---|---|
| 150W/300W | 150W ↔ 300W | 25–80 gallons | Ideal for medium tanks. |
| 250W/500W | 250W ↔ 500W | 50–106 gallons | Balanced power for larger tanks. |
| 400W/800W | 400W ↔ 800W | 80–132 gallons | High-efficiency heating. |
| 500W/1000W | 500W ↔ 1000W | 106–211 gallons | Big power for large tanks. |
| 600W/1200W | 600W ↔ 1200W | 132–238 gallons | Big power for large tanks. |

Specification















THANKS IT IS WORKING GREAT VERY HAPPY WITH IT THE IS MY SECOND ONE NOW NEED LIGHTS FOR MY BIG TANK
Nice heater
Heater works great , keeps my aquarium exactly the temp I set at.
Great heater. I love the dual power option. My tanks do need some heat in the summer but do not need a large amount of wattage, whereas when winter comes it is great to be able to set the heater to a higher setting to accomodate for the larger difference in temp that the heater will need to compensate for.
I like it’s adjustable heating power, in my tetra tank 150 gallons, I can set the 500W in the morning and the 1000W power in the night, it save my bill