Dophin · Preset
AH-1000 Plastic Mini Heater
- Heater
- 10–25 W
- Tank size
- up to 30 L
A nano or small shrimp tank that just needs taking off the chill.
3 models
Eheim · Preset
Eheim ThermoPreset
ThermoPreset is fixed at 25 °C with nothing to adjust. It is slim, around 2.8 cm across, and wrapped in a plastic sleeve, so it is a sensible pick for a simple community tank or a first aquarium.
Updated
50–200 W4 models
Will it suit my tank?
litres
Best for
Beginners and community planted tanks that are happy at 25 °C.
Worth knowing
You cannot change the temperature, so it is no good for cooler-water species or shrimp that prefer low 20s.
What stands out
- Factory set to 25 °C, no dial to knock
- Plastic casing, tougher than a bare glass tube
- Dry-run protection and an LED heating lamp
- Slim 2.8 cm diameter
Models and specs
| Model | Heater | Tank size | Length |
|---|---|---|---|
| 50 W | 50 W | 25–60 L | 16.9 cm |
| 100 W | 100 W | 100–150 L | 18.4 cm |
| 150 W | 150 W | 200–300 L | 22.4 cm |
| 200 W | 200 W | 300–400 L | 25.4 cm |
- Brand
- Eheim
- Temperature
- Fixed 25 °C
- Diameter
- 2.8 cm
- Water type
- Freshwater and marine
- Warranty
- 3 years
Figures from the maker's published specifications. Makers revise products, so check the current figures before buying. Photos supplied by the brand or its distributor.
Compare with
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Dophin · Preset
AH-1010 Mini Heater
- Heater
- 5–15 W
- Tank size
- up to 15 L
A small shrimp or betta tank where you just want a stable, sensible temperature.
3 models
Boyu · Glass
DR Digital Heater
- Heater
- 50–300 W
Everyday tropical tanks where you want to see the temperature without a separate thermometer.
6 models
Boyu · Glass
DR-9 Series Heater
- Heater
- 50–300 W
General tropical tanks on a budget.
7 models
Frequently asked questions
Quick answers about the Eheim ThermoPreset, drawn from its specs.
What size tank is the Eheim ThermoPreset for?
The maker rates it by model: 50 W up to 60 L, 100 W up to 150 L, 150 W up to 300 L, 200 W up to 400 L.
What wattage is the Eheim ThermoPreset?
50 to 200 W across the range. As a rule of thumb that covers roughly 33–200 L in a normally heated room, at about 1 W per litre.
Who is the Eheim ThermoPreset best for?
Beginners and community planted tanks that are happy at 25 °C.
Is there anything to watch out for with the Eheim ThermoPreset?
You cannot change the temperature, so it is no good for cooler-water species or shrimp that prefer low 20s.
What are the alternatives to the Eheim ThermoPreset?
Other heaters worth comparing: Dophin AH-1000 Plastic Mini Heater, Dophin AH-1010 Mini Heater, Boyu DR Digital Heater. Add any of them to the compare table to see the specs side by side.