EHEIM thermocontrol 250 heater
SKU: 52965972966

EHEIM thermocontrol 250 heater

Sale price$166.45 Regular price$184.95
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Description

EHEIM thermocontrol 250 heaterWith the EHEIM precision heater, your fish will enjoy the perfect temperature in any aquarium. Diameter 36 mm Height 452 mm Performance at 50 Hz 250 Watt Max. temperature 34C Sea water Yes Min. temperature 18C Freshwater Yes Packing dimensions (Width) 6. 5 cm Packing dimensions (Height) 58. 5 cm Packing dimensions (Depth) 5 cm For aquariums up to approx. 600 Liter For aquariums of about 400 Liters Simple ideas often turn out to be the most effective.

With the EHEIM precision heater, your fish will enjoy the perfect temperature in any aquarium.

  • Diameter Ø 36 mm
  • Height 452 mm
  • Performance at 50 Hz 250 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. 600 Liter
  • For aquariums of about 400 Liters

Simple ideas often turn out to be the most effective. Take, for instance, the aquarium heater designed as a rod. This heating rod is easily suspended in the water to warm it. While the concept has remained unchanged for decades, significant advancements have been made over time. Today, the EHEIM adjustable heater represents a state-of-the-art electronic heating device that utilizes the latest technology. Its jacket, crafted from specialized laboratory glass, enhances the heating surface, acts as a heat shield, and guarantees optimal, uniform heat distribution. Whether you need to heat a 20-liter or a 1000-liter aquarium, you can choose from 9 available sizes.

Advantages of the EHEIM thermostatic heaters

  • Accurate temperature adjustment from 18 to 34 °C
  • Easy and secure recalibration (±2 °C)
  • Temperature control precision ± 0.5 °C
  • Heat maintained at a consistent level
  • Heating function indicated by a control lamp
  • Completely submersible (watertight)
  • Features automatic dry run shut-off (Thermo Safety Control)
  • A glass jacket enhances the heating surface and guarantees optimal, even heat distribution
  • Convenient cable length of approximately 170 cm
  • Includes double suction cup holder
  • 9 sizes available for aquariums ranging from 20 to 1000 liters
  • Suitable for both freshwater and marine environments
  • Precision, user-friendliness, quality, and safety “Made in Germany”

The EHEIM aquarium heater is an advancement of the iconic heating rod. The temperature can be set with precision between 18 and 34 °C and can be recalibrated if necessary (±2°). It maintains a constant temperature level, and its heating function is signaled by a control lamp. The rod is fully watertight, can be completely submerged, and includes an automatic dry run shut-off feature (Thermo Safety Control), making it suitable for both freshwater and saltwater aquariums.

One of the most significant innovations is the glass jacket:

  • It expands the heating surface,
  • Concentrates the heat to ensure optimal, even heat distribution, and
  • Acts as a heat shield (safe for your aquatic life).

This jacket is made from specialized laboratory glass, designed for research applications. Therefore, it is free from harmful substances that could leach into the water. It is resistant to both chemical and biological agents, free from fissures or fine cracks that could allow moisture to seep in. Even extreme temperature fluctuations that may occur during water changes will not damage this glass.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 52965972966

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Garrett
Belleville, US
★★★★★ 5
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T-Shirts are very nice. They run small. Order 1 size up
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Reviewed in the United States on December 31, 2025
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Amazon Customer
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★★★★★ 3
Mock turtle neck sagged and did not fit well.
Shirt is well made. Collar not so much. Sagged and did not fit well. Donated to Goodwill.
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Reviewed in the United States on April 29, 2026
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Richard T. Russell
Belleville, US
★★★★★ 5
A Difficult to Find T-Shirt
These T-Shirts are nice. A super difficult to find. The manufacturer calls it a mock-turtle neck (MTN). But the collar height is actually a bit shorter than the traditional MTN, which is great. It's closer to a regular T-Shirt that comes all the way to the neckline. And very somt a comfortable. This is the perfect style of T-Shirt to wear under a sportscoat, if desired. Or under a shirt where you want the T-Shirt to show for contrast. Just the right look.
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Reviewed in the United States on February 17, 2026
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Dario Escobar
Houston, US
★★★★★ 1
Sugerencia
Me llego pero el pedido tiene un fuerte mal olor a agua tipo de químico que aún lavandolo no se se va el mal olor . primera ves que me pasa esto
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Reviewed in the United States on March 7, 2026
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katherine
Pawtucket, US
★★★★★ 4
Nice shirts for the price! But do not recommend for thick body types.
I bought 3 different ones. 2 Mediums and 1 2XL. The mediums fit correct and really nice! Would definitely recommend for the price! More like a exercise material, and sticks to your body shape... Sooo the 2Xl did not fit the person correct. Was so tight... And the strech is to stick to your body... So would not recommend for anyone a bit hefty or fit tbh. But the shirts are good materials and feel nice for a fresh day out or to use as gym clothes!!
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Reviewed in the United States on August 26, 2025

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