Eheim Jager 200W Submersible Aquarium Heater

The Eheim Jager 200W Submersible Aquarium Heater is built to warm larger aquariums of roughly 79–106 gallons with the same German precision the Jager line is famous for. Adjustable TruTemp dial, shatterproof glass, and automatic dry-run protection mean stable temperatures and peace of mind for bigger tropical and marine setups.

Why aquarists trust the Jager

• 200 watts of reliable heat: Sized for larger aquariums around 79–106 gallons
• Precise TruTemp dial: Adjustable from 65–93°F (18–34°C) with a calibratable dial for spot-on accuracy
• Fully submersible: Mount it horizontally or vertically, freshwater or saltwater
• Shatterproof glass: Lab-grade, durable construction
• Thermo Safety Control: Automatic shutoff protects against accidental dry running

Setup & safety tips

• Place the heater near good water flow (by a filter outlet) so heat spreads evenly.
• After plugging in or before unplugging, wait ~15 minutes for the glass to adjust to water temperature.
• Always verify the actual tank temperature with a separate thermometer.

Not sure on sizing? Need more or less power? See the 150W and 250W options. Browse all aquarium heaters or the full Eheim equipment lineup.

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