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EHEIM thermocontrol e 125 Adjustable Aquarium Heater
Model: thermocontrol e 125 (Type 3635) · US configuration
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A 125 W adjustable, fully submersible glass heater for aquariums up to approximately 200 L / 53 US gal, with a 68–90°F control range and documented fresh- and marine-water use.
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Explore this buying guide ↗Why consider this model?
- Consider this adjustable model when a fresh or marine aquarium fits EHEIM's approximate 150–200 L guidance, the target is within 68–90°F, and the 309 mm glass heater can be installed vertically below its marked waterline in strong flow.
Tradeoffs to weigh
- Its published maximum is 53 US gallons, it remains a glass rather than documented shatterproof heater, and the manual requires vertical immersion, a minimum waterline and an exact electrical-label check. Its maximum does not guarantee performance in a cold room.
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