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EHEIM thermocontrol e 300 Adjustable Aquarium Heater
Model: thermocontrol e 300 (Type 3639) · US configuration
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A 300 W adjustable, fully submersible glass heater for aquariums rated up to about 1,000 L / 264 US gal, with a 68–90°F control range and freshwater and marine-water support.
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Explore this buying guide ↗Why consider this model?
- Consider the 300 W Type 3639 for an aquarium in EHEIM's approximate 600–1,000 L range (up to 264 US gallons) when the adjustable 68–90°F setting, vertical mounting and nearly 19.5 inches of heater clearance are suitable.
Tradeoffs to weigh
- The 264-gallon maximum is a manufacturer rating, not a tested heating guarantee. Its 496 mm body is substantially longer than the e 150/e 200 sizes, and impact-resistant glass is not a shatterproof-body claim; verify electrical identity, vertical water-line marks and circulation.
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