The EHEIM thermocontrol e is a precision electronic aquarium heater from Germany's EHEIM, built for large freshwater, planted, and marine/reef aquariums where a stable temperature matters. An electronic controller holds your set temperature to within ±0.5 °C, so there is no drifting and no readjusting after setup.
Key features
- Electronic temperature control — set anywhere from 20 °C to 32 °C, held to ±0.5 °C.
- Dry-run protection (Thermo Safety Control) — shuts the heater down if it is ever operated out of water.
- Special laboratory glass jacket — acts as a heat shield and spreads heat evenly into the water.
- Two-colour control lamp — red while heating, green once the set temperature is reached.
- Fully submersible and waterproof; mount it vertically or at an angle.
- Fresh and saltwater safe — ideal for reef tanks, cichlid tanks, discus and planted aquascapes.
- Handy ~170 cm cable and double suction-cup holder included.
Which wattage do I need?
| Model | Recommended aquarium size | EHEIM art. no. |
|---|---|---|
| 300 W | 600 – 1000 litres | 3639010 |
| 400 W | approx. 1000 – 1200 litres | 3640010 |
Tip: in a cool room or a very large tank, splitting the load across two heaters gives even heat and a safety backup if one ever fails.
Specifications
| Temperature range | 20 – 32 °C |
| Control accuracy | ± 0.5 °C |
| Dimensions (both models) | 496 mm long × 36 mm diameter |
| Cable length | approx. 170 cm |
| Housing | Special laboratory glass |
| Safety | Dry-run protection (Thermo Safety Control) |
| Water type | Freshwater & saltwater |
In the box
- EHEIM thermocontrol e heater
- Double suction-cup holder
- Instructions
Good to know
- Always keep the heater submerged at least to the minimum water-level mark.
- Unplug the heater before any water change or removing it from the tank.
- Do not run it through an external timer or controller — it has its own electronic thermostat.
Genuine EHEIM product, shipped from Astra Aquatics, Chennai. Need help choosing the right heater for your tank? Contact us and we'll size it for you.