Eheim ThermoControl e Electronic Aquarium Heater (100W–300W)
- Ships via UPS.
- Calculated at checkout.
- Usually ships in 1 to 3 business days.
Aquarium and livestock sold separately. Photos show Eheim packaging artwork for size and feature reference.
The Eheim ThermoControl e is Eheim’s electronic aquarium heater. Electronics measure and hold the temperature you set, and a control lamp shows when the heater is warming (red) or has reached the set point (green). It is a different product from our basic dial-set Eheim Ebo Jager / thermocontrol heaters, which use a manual dial instead of electronic control.
Choose from five sizes, 100W to 300W, for aquariums from about 26 to 264 gallons (100 to 1,000 liters). The heater is fully submersible, uses a laboratory-glass jacket for even heat, and has dry-run shut-off (Thermo Safety Control). Eheim rates it for freshwater and saltwater. Ships via UPS.
Features
- Electronic temperature control: precise adjustment from 68–90°F (20–32°C). Eheim says no readjustment is necessary once the temperature is set.
- Steady control: holds temperature to ±1°F (±0.5°C) and keeps heat at a constant level.
- Control lamp: red while the heater is warming the water, green when the set temperature is reached.
- Fully submersible: watertight and designed to hang in the aquarium.
- Thermo Safety Control: automatic dry-run shut-off if the heater is not in water.
- Laboratory-glass jacket: increases the heating surface, acts as a heat shield, and helps emit heat evenly.
- Cable and mount: about 67 in (170 cm) of cable, plus a double suction cup holder.
- Freshwater or saltwater: Eheim rates this heater for both.
Sizes & Specs
| Spec | e100 | e150 | e200 | e250 | e300 |
|---|---|---|---|---|---|
| Fits aquariums | 26–40 gal (100–150 L) | 53–79 gal (200–300 L) | 79–106 gal (300–400 L) | 106–159 gal (400–600 L) | 159–264 gal (600–1,000 L) |
| Power | 100 W | 150 W | 200 W | 250 W | 300 W |
| Length | 12.2 in (309 mm) | 13.2 in (335 mm) | 15.6 in (396 mm) | 17.4 in (442 mm) | 19.5 in (496 mm) |
| Diameter | 1.4 in (36 mm) | 1.4 in (36 mm) | 1.4 in (36 mm) | 1.4 in (36 mm) | 1.4 in (36 mm) |
| Temperature range | 68–90°F (20–32°C) | 68–90°F (20–32°C) | 68–90°F (20–32°C) | 68–90°F (20–32°C) | 68–90°F (20–32°C) |
| Accuracy | ±1°F (±0.5°C) | ±1°F (±0.5°C) | ±1°F (±0.5°C) | ±1°F (±0.5°C) | ±1°F (±0.5°C) |
| Cable length | 67 in (170 cm) | 67 in (170 cm) | 67 in (170 cm) | 67 in (170 cm) | 67 in (170 cm) |
| Freshwater / saltwater | Yes | Yes | Yes | Yes | Yes |
| SKU | EHM00516 | EHM00518 | EHM00519 | EHM00520 | EHM00631 |
Specs from Eheim’s official thermocontrol-e documentation (types 3634, 3636, 3637, 3638, and 3639). Gallon ranges follow Eheim’s published U.S. gallon ratings and are heater capacity, not tank freight sizes. Eheim also makes 25W, 50W, 75W, 125W, and 400W thermocontrol-e sizes that we do not currently stock. For tanks in the 40–53 gallon range, where Eheim’s 125W would normally apply, choose the 150W or contact us. Eheim may update parts and ratings between production runs.
What’s in the Box
- Eheim ThermoControl e electronic aquarium heater (wattage you select)
- Double suction cup holder
- Eheim instruction manual
Aquarium not included.
Shipping
Ships via UPS. This is an aquarium heater, not an aquarium, so it does not ship freight.
Warranty
The Eheim ThermoControl e heater is covered by Eheim’s manufacturer warranty only. Eheim states a 3-year manufacturer guarantee on this line; please see the Eheim packaging and manual for terms. TRUVU does not provide a separate warranty on Eheim products.
FAQ
Is this the same as the Eheim Ebo Jager / thermocontrol heater?
No. This is Eheim’s electronic ThermoControl e heater, with electronic control and a 68–90°F (20–32°C) range. The Eheim Ebo Jager is the basic dial-set heater, which Eheim now also labels thermocontrol (without the “e”). You can carry either one; the Jager is the more affordable option.
Is this the Wi-Fi thermocontrol+ e?
No. This page is for the electronic ThermoControl e, which you set on the heater itself. The thermocontrol+ e is a separate Wi-Fi model that Eheim sells for app control. It is not the product shown here.
Which wattage do I need?
Use Eheim’s capacity ranges in the chart above. If your aquarium sits between two sizes, or in the 40–53 gallon gap where Eheim’s 125W would normally apply, choose the next size up or contact us before you order. Browse our aquarium heaters.
Can I use it in a saltwater tank?
Yes. Eheim rates the ThermoControl e for both freshwater and marine aquariums. Shop our freshwater acrylic fish tanks and saltwater aquariums.
What warranty does it have?
It is covered by Eheim’s manufacturer warranty. Eheim states a 3-year manufacturer guarantee on this line; see the Eheim packaging and manual for details. TRUVU does not provide a separate warranty on Eheim products.
Pairs well with
Eheim ThermoControl e Electronic Aquarium Heater (100W–300W)