EHEIM Thermo Control Heater 400w

EHEIM Thermo Control Heater 400w

EHEIM Thermo Control Heater 400w is an electronically controlled, fully submersible aquarium heater that keeps your water at a stable, accurate temperature for the fish and invertebrates that depend on it. Sold as the EHEIM thermocontrol-e 400, this 400 W model is built for large aquariums of 1000 to 1200 litres (264 to 317 gal) and suits both freshwater and marine set-ups. It is designed for South African fishkeepers running big display tanks who want a reliable, German-made heater for tropical or subtropical livestock.

Key Benefits

• Precise, adjustable temperature: Set the water temperature anywhere from 20°C to 32°C. The electronic control holds it to within ±0.5°C of your chosen setting.
• Laboratory glass coating: A special laboratory glass coating enlarges the effective heating surface and also acts as a heat shield, which helps spread warmth evenly through the water rather than creating hot spots.
• Built-in dry-running protection: EHEIM's Thermo Safety Control protects the heater if it runs dry, for example when water levels drop during maintenance or through evaporation.
• Fully submersible and waterproof: The heater can sit completely underwater, giving you flexible placement options in the tank or sump.
• Freshwater and marine use: Safe for fresh water and salt water, so one heater model covers community tanks, cichlid displays and reef or fish-only marine systems.
• Dual-colour status lamp: The control lamp glows red while the heater is warming the water and turns green once your set temperature is reached, so you can check its status at a glance.
• Durable, eco-friendly glass: The coating is made from eco-friendly laboratory glass that resists chemical and biological influences, contains no pollutants and is resistant to condensation problems and impact.
• Handles temperature swings: The glass withstands extreme temperature changes, such as those during water changes when fresh water of a different temperature is added.
• Made in Germany: Engineered and manufactured in Germany to EHEIM's standards of precision and reliability.
• 3-year warranty: Backed by a 3-year warranty for added peace of mind on a long-term piece of life-support equipment.

How to Use

Because the thermocontrol-e 400 is fully submersible and waterproof, it can be placed completely underwater in your aquarium. Choose your target temperature between 20°C and 32°C to match the needs of your livestock. The lamp shows red while the heater is working and green once the water has reached the set temperature. From there the electronics keep the temperature within ±0.5°C, giving tropical and subtropical fish the steady conditions they need.

Suitable For

• Aquariums of 1000 to 1200 litres (264 to 317 gal)
• Freshwater aquariums
• Marine (saltwater) aquariums
• Tropical and subtropical fish that need a consistent, controlled temperature

Compatibility

This 400 W model belongs to the EHEIM thermocontrol-e range, which comes in 10 different wattages covering tanks from 20 to 1200 litres (5.3 to 317 gal). The 400 W unit sits at the top of that range and is matched to the largest aquariums, 1000 to 1200 litres. If your tank is smaller, a lower-wattage model from the same series is the better match.

Specifications

• Brand: EHEIM
• Model: thermocontrol-e 400 (400 W)
• Recommended aquarium volume: 1000 to 1200 litres (264 to 317 gal)
• Temperature range: 20°C to 32°C
• Control accuracy: ±0.5°C
• Control type: electronic
• Safety: Thermo Safety Control dry-running protection
• Construction: fully submersible, waterproof, eco-friendly laboratory glass coating
• Water type: fresh water and marine
• Indicator: dual-colour control lamp (red = heating, green = set temperature reached)
• Origin: Made in Germany
• Warranty: 3 years

A Legacy of Aquarium Heating

EHEIM's heater line traces back to engineer Eugen Jäger, the inventor of the aquarium heater. The thermocontrol-e is the latest electronically controlled version of that design, a clear step on from traditional heaters. It focuses on precise control, easy operation and safety, so your tropical and subtropical fish get a stable, well-managed habitat.

What's Included

• EHEIM thermocontrol-e 400 aquarium heater, 400 W, for aquariums of 1000 to 1200 litres (264 to 317 gal)

Frequently Asked Questions

Is the 400 W model the right size for my tank?
This heater is rated for aquariums of 1000 to 1200 litres (264 to 317 gal). The thermocontrol-e series comes in 10 wattages covering 20 to 1200 litres, so a smaller tank is better served by a lower-wattage model from the range.

Can I use this heater in a marine or reef aquarium?
Yes. The thermocontrol-e 400 is safe for both fresh water and marine water. Its laboratory glass coating resists chemical and biological influences.

What happens if the water level drops and the heater is exposed?
The heater has EHEIM's Thermo Safety Control, which provides dry-running protection. This is useful during water changes or when evaporation lowers the water level in warm South African weather.

Will adding colder or warmer water during a water change damage the glass?
The eco-friendly laboratory glass coating is designed to withstand extreme temperature changes during water changes. It is also resistant to impact and condensation problems.

Does this heater also cool my aquarium in a hot South African summer?
No. It is a heater with a set range of 20°C to 32°C, and it cannot lower the water temperature. If your tank overheats in summer, you will need a separate cooling solution such as an aquarium chiller.

How do I know the heater is working?
The dual-colour control lamp glows red while the heater is warming the water. It turns green once your chosen temperature has been reached, and the electronics then hold it within ±0.5°C.

When can I expect delivery?

• Gauteng (Jhb/Pta) - 1-3 working days
• Nationwide (Cpt/Dbn+) - 2-5 working days
• Outlying Areas - 3-7 working days

All orders are sent via Economy Road, typically through Fastway or Internet Express Couriers*. Estimated timeframes are not guaranteed. Once the order is collected by the courier, we have no control over third-party logistics and cannot make any time promises.

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