Eheim Jager 50W Aquarium Heater Fully Submersible

The Eheim Jager 50W Aquarium Heater delivers precise, dependable warmth for small aquariums of 7–16 gallons. Fully submersible and built from shatterproof, lab-grade glass, it pairs the famous Jager TruTemp dial with automatic dry-run protection — so your tank stays at the perfect temperature with zero fuss.

Why aquarists trust the Jager

• 50 watts of reliable heat: Sized for small aquariums of 7–16 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? Have a slightly bigger tank? See the 75W or 100W. Smaller nano? Try the 25W. Browse all aquarium heaters or the full Eheim equipment lineup.

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