Overview
The BOYU DR Series Digital Heater (models DR-200 and DR-300) delivers precise, reliable heating for aquariums and marine tanks. With digital temperature control and built-in safety protections, it’s designed to maintain stable water temperature while protecting your aquatic life.
Key Features
- Digital thermostat & LED temperature display: Easily set and monitor the water temperature.
- Submersible & safe glass tube design: Made from heat-resistant, flame-proof glass suitable for both freshwater and saltwater systems.
- Automatic protection: Safety shutdown in case of low water level or overheating — helps prevent accidents if water levels drop or heater is removed.
- Even heating & quick warm-up: Efficient heating coil delivers stable temperature throughout the tank.
- Wide compatibility: Suitable for different tank types — tropical, freshwater, planted, or marine setups.
Specifications
| Model | DR-200 | DR-300 |
|---|---|---|
| Power | 200 W | 300 W |
| Recommended Tank Size | ~150–200 L | ~200–300 L |
| Temperature Range | Adjustable (typical 16–32 °C) | Same |
| Construction | Heat-resistant glass tube, fully submersible | Same |
| Safety | Auto shut-off for low water / overheat | Same |
| Suitable For | Freshwater & marine aquariums | Same |
Why Choose DR-200 / DR-300?
- Stable, digital temperature control—ideal for tropical fish, planted tanks, or marine setups.
- High safety level thanks to auto-shutoff and heat-resistant materials.
- Good for medium to large aquariums where consistent water temperature is critical.
- Durable and submersible — can be left in tank without needing external setups or in-line heaters.
Usage & Installation Tips
- Mount heater vertically using suction cups against aquarium glass for best water circulation.
- Set desired temperature on digital controller, then monitor water thermometer to verify actual water temp.
- Ensure heater remains fully submerged — do not let water level drop below minimum indicated line.
- Do not combine with bare gravel bottom without guard — avoid contact with substrate or decor to prevent hotspots.
- For marine or planted tanks, pair heater with good water circulation to distribute heat evenly.










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