IllustrationHeaters · Temperature equipment
EHEIM Jäger 100 W, taken apart
A 100 W adjustable glass heater. EHEIM’s manual chart lists this model for 100–150 L, which includes 120 litres. The manual also requires regular water-temperature checks.
100W
Power
100–150L
Manual chart
31.9cm
Total length
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Taken apart
Every part
The verdict
Works / doesn't
What works
- The manual describes a thermal circuit breaker that switches off if operated dry or at too-low a water level.
- The manual describes a recalibration procedure using a precise thermometer.
What doesn't
- The manual requires vertical installation and regular water-temperature checks.
- If its setting scale does not match measured water temperature after 1–2 days, the manual describes readjusting it with a precise thermometer.
Care
- Install vertically in an area with strong flow, respecting water-level markings.
- Before first switching on, leave the heater in aquarium water for 20–30 minutes (manual).
- Disconnect and allow at least 30 minutes cooling in water before removal (manual).
Specs
The numbers
| Model | Jäger thermocontrol 100; type 3614 |
|---|---|
| Power | 100 W |
| Tank chart | 100–150 L (EHEIM manual) |
| Dimensions | 3.6 cm diameter × 31.9 cm total length |
| Installation | Vertical, below water level, in strong flow; respect minimum water level and maximum 0.5 m immersion depth |
| Adjustment | 18–34 °C (manual) |
Sources
Where this comes from
- EHEIM thermocontrol manual, type 3614: technical chart p. 3; operation pp. 10–13
- Amazon UK listing B003SNU1I2; product and reference photos, checked 2026-10-25
- Seriously Fish: Puntius titteya aquarium base and care
- JUWEL: Lido 120 LED dimensions and rated volume
From our TikTok post “120 litres? 100 W fits the chart. EHEIM Jäger 100 W”. How we review.
