🔥 Hygger HG031 100W Aquarium Heater – Compact Submersible Thermostat Heater

The Hygger HG031 100W Aquarium Heater is a durable, compact, and fully submersible heater designed to maintain precise and stable temperatures in small to medium aquariums. Ideal for freshwater, saltwater, and planted tanks, this heater provides consistent warmth for your fish, shrimp, and aquatic plants.

Equipped with an intelligent thermostat system, the HG031 automatically maintains your desired temperature while ensuring safety through built-in overheat and dry-run protection.

🌟 Key Features

🌡️ Adjustable Temperature Control – Easy dial allows precise settings from 68–90°F (20–32°C)
💧 Fully Submersible Design – Compact size fits vertically or horizontally in most tanks
🔥 100W Output – Ideal for aquariums up to 25 gallons
⚙️ Smart Overheat Protection – Automatically shuts off when out of water or overheating
🐠 Durable Quartz Glass Construction – Shatterproof and corrosion-resistant

⚙️ Specifications

• Brand: Hygger
• Model: HG031
• Power: 100 Watts
• Voltage: 110–120V
• Temperature Range: 68°F–90°F (20–32°C)
• Accuracy: ±1°F
• Tank Size: Up to 25 gallons
• Cord Length: 5.5 ft
• Material: Quartz glass with protective casing
• Mounting: Fully submersible with suction cups
• Indicator Light: Yes – heating status LED

💡 Usage Tips

• Place near a filter outlet or bubbler for even heat distribution.
• Allow 10–15 minutes for temperature acclimation before plugging in.
• Use a digital thermometer to verify accuracy.
• Suitable for freshwater, marine, and planted setups.

❓ FAQ

Q: Is the Hygger HG031 heater adjustable?
A: Yes, you can easily set the temperature from 68–90°F with the control dial.

Q: What size tank does the 100W model support?
A: Best for aquariums up to 25 gallons.

Q: Does it have safety shut-off?
A: Yes—includes both overheat and dry-run protection.

Q: Is it suitable for saltwater tanks?
A: Absolutely—works great in freshwater, marine, and planted tanks.

Q: Can I install it horizontally?
A: Yes—horizontal or vertical placement is fine as long as it’s fully submerged.