EHEIM thermocontrol 300 heater

With the EHEIM precision heater, your aquatic friends will enjoy the perfect temperature, no matter the aquarium size.

• Diameter Ø: 36 mm
• Height: 506 mm
• Performance at 50 Hz: 300 Watt
• Max. temperature: 34°C
• Sea water: Yes
• Min. temperature: 18°C
• Freshwater: Yes
• Packing dimensions (Width): 6.5 cm
• Packing dimensions (Height): 58.5 cm
• Packing dimensions (Depth): 5 cm
• For aquariums up to approx.: 1000 Liter
• For aquariums of about: 600 Liters

Simple yet effective ideas often yield the best results. Take the aquarium heater, for instance, designed as a rod that hangs effortlessly in the water to provide warmth. While the basic principle has remained unchanged for decades, significant advancements have occurred since then. The EHEIM adjustable heater is now a state-of-the-art electronic thermal device equipped with the latest technology. Its jacket, crafted from specialized laboratory glass, enhances the heating surface, acts as a heat shield, and ensures optimal, uniform heat distribution. Whether you need to heat a 20-liter or a 1000-liter aquarium, you have 9 sizes available to choose from.

Advantages of the EHEIM thermostatic heaters:

• Accurate temperature adjustment from 18 to 34 °C
• Easy and secure recalibration (±2 °C)
• Temperature control precision of ± 0.5 °C
• Maintains a steady heat level
• Heating function indicated by a control lamp
• Fully submersible (watertight)
• Automatic dry run shut-off feature (Thermo Safety Control)
• A glass jacket enhances the heating surface and guarantees optimal heat distribution
• Convenient cable length of approximately 170 cm
• Includes double suction cup holder
• Nine sizes suitable for aquariums ranging from 20 to 1000 liters
• Appropriate for both fresh and marine water

Precision, user-friendliness, quality, and safety — all “Made in Germany.” The EHEIM aquarium heater represents an evolution of the classic heating rod. You can precisely set the temperature between 18 and 34 °C and calibrate it if needed (±2°). The temperature control accuracy is ± 0.5 °C, ensuring consistent heating. A control lamp indicates when the heating function is active. The rod is completely watertight, can be fully submerged, and features an automatic dry run shut-off (Thermo Safety Control), making it suitable for both freshwater and saltwater environments. A key innovation is the glass jacket, which:

• Expands the heating surface
• Concentrates heat for optimal, even distribution
• Acts as a heat shield (safe for your aquatic life)

The jacket is made from high-quality laboratory glass, designed for research use, ensuring it is free from harmful pollutants that could leach into the water. It is resistant to chemical and biological substances, and its construction prevents any fissures or cracks that could allow condensation to infiltrate. Even significant temperature changes during water changes will not harm this durable glass.