EHEIM Thermopreset Heaters

Keep your aquarium at a stable 25°C with the EHEIM Thermopreset Heater – compact, precise, and protected for safe, stress-free heating.

The EHEIM Thermopreset Aquarium Heater takes the guesswork out of temperature control by maintaining a constant and comfortable 25°C (77°F) — the ideal range for most tropical fish. Designed with simplicity and precision in mind, this slimline heater features advanced electronic temperature control for reliable accuracy and consistent heat distribution.

Unlike standard heaters, the Thermopreset includes a durable plastic safety casing for added protection and mechanical stability, making it safer for both the heater and your aquarium inhabitants. A built-in LED indicator shows when the unit is actively heating, while dry-run protection prevents damage if the heater is accidentally left running outside of water.

Available in four sizes (50W, 100W, 150W, 200W), the EHEIM Thermopreset suits tanks of various sizes, from nano aquariums to larger setups. With its sleek 2.8 cm diameter and short length, it fits discreetly into any aquascape.

Key Features:

• Preset Temperature (25°C): Perfect for most tropical species – no adjustment needed
• Precision Electronic Control: Maintains stable temperature with high accuracy
• Durable Plastic Casing: Extra protection for safety and long-term use
• Slim & Compact Design: Unobtrusive in any tank, ideal for small aquariums
• LED Heating Indicator: Visual confirmation when the heater is active
• Dry-Run Protection: Prevents overheating when not submerged
• Easy Installation: Includes suction cups for secure mounting
• Fresh & Marine Safe: Suitable for all types of aquariums
• Available in 4 Sizes: 50W, 100W, 150W, and 200W
• Backed by 3-Year Warranty

Choose the right size for your tank and enjoy peace of mind with EHEIM’s trusted German engineering.