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EHEIM thermocontrol e 25 Adjustable Aquarium Heater
Model: thermocontrol e 25 (Type 3631) · US configuration
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A 25 W adjustable, fully submersible glass heater for aquariums up to approximately 25 L / 6.6 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 small adjustable model when a fresh or marine aquarium is within EHEIM's approximate 20–25 L guidance, the target is within 68–90°F, and a short vertical glass heater can sit below its marked waterline in strong circulation.
Tradeoffs to weigh
- Its stated maximum is only 6.6 US gallons, its glass body is not documented as shatterproof, and the instructions require vertical immersion, a marked water level and an electrical-label check. The capacity rating does not promise performance in a cold room.
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