Key benefits
Precision and safety
ULTRA HEATER PRO BT is designed to heat water in freshwater and marine aquariums, paludariums, aquaterrariums and water sections within terrariums.
A highly sensitive, fully electronic thermostat ensures a stable water temperature without the risk of overheating or sudden fluctuations. The adjustable range of 19°C to 33°C allows precise settings for both tropical and biotope aquariums.
Dual thermal protection safeguards the device against overheating. If the heater is taken out of the water or begins to overheat, the electronic system immediately disconnects power to the heating element. Once the temperature falls to a safe level, the device automatically resumes normal operation.
The housing is made from a crack-resistant composite that is completely safe for fish and plants. Even heat distribution helps maintain stable conditions throughout the aquarium. The heater has an IPX8 waterproof design and is intended for fully submerged operation at depths of up to 80 cm.
Modern design and ease of use
ULTRA HEATER PRO BT features a flat, compact housing that blends perfectly into the aquarium layout. Its small dimensions mean that the device takes up little space and can easily be concealed among the aquarium equipment.
The reversible holder allows the heater to be installed in the preferred position, while the clear digital display shows the current water temperature and makes the device easy to configure.
Proven quality and reliability
Every ULTRA HEATER PRO BT is manually tested and calibrated in Aquael’s laboratory. This ensures the highest quality, precise operation and a long service life.
The heater uses Aquael Smart Heating System technology and belongs to a range of intelligent aquarium devices controlled via Bluetooth.
Four models are available in the Ultra Heater BT range:
Mobile app-controlled heater
Turn your phone or tablet into a mobile control centre for your aquarium equipment!
Connect ULTRA HEATER PRO BT via Bluetooth and control it with the dedicated AQUAEL BT app. Simply download the app from the App Store or Google Play. Its interface is intuitive and easy to read.
The Aquael BT app for Ultra Heater BT heaters allows you to:
Bluetooth control via the app
The AQUAEL BT app provides extensive access to the heater’s functions. In constant mode, you can switch on the heating, set the target temperature and define the heater’s maximum operating power. On your phone, you can also check the current temperature and view the temperature history recorded by the thermometer.
Day&Night mode offers even more options. In the app, you can set separate daytime and night-time temperatures. You can also select the exact times for ‘sunrise’ and ‘sunset’. This makes it possible to reproduce the temperature difference between day and night found in natural bodies of water, where the water temperature naturally falls by several degrees at night. Temperature changes are smooth, without sudden shifts that could stress the fish. The transition time between modes can be programmed up to 180 minutes, in 15-minute increments.
You can tailor the device to your preferences by selecting the temperature unit – degrees Celsius or Fahrenheit. You can also define lower and upper temperature alarm thresholds and decide whether alerts should include an audible signal.
You can also set an individual PIN in the app to protect the saved settings.
Clear operating status indication
The function LED uses colours and different light patterns to indicate the current heater status. When the device is connected to the power supply, the LED lights up white.
The function LED uses colours and different light patterns to indicate the current heater status.
| Colour and LED pattern | Meaning |
| Steady white light | The device has been connected to the power supply correctly |
| Steady green light | The heater is maintaining the set water temperature |
| Flashing green light | The heater is actively heating the water to the set temperature |
| Steady yellow light | The heating function has been switched off in the AQUAEL BT app |
| Flashing yellow light | The temperature has fallen below the lower alarm threshold or risen above the upper alarm threshold set by the user |
| Single white flashes | The user’s settings are being saved |
| Continuous white flashing | Identifies the selected device. This function is particularly useful when the user operates several ULTRA HEATER PRO BT heaters |
| Single blue flashes | The device is establishing a connection with the AQUAEL BT app |
| Flashing red light | Device error, overheating or operation of the heater out of water. Power to the heating element is disconnected immediately and the heating function is disabled |
| Sequence: red–green–blue–white | Restoring the device’s factory settings |
Would you like to keep control of your aquarium’s filtration and heating at your fingertips wherever you are? Simply add the Wi-Fi Gateway BT, which connects to Aquael BT devices via Wi-Fi and allows you to control and monitor your equipment from anywhere in the world.
| Art. nr. |
| Aquarium capacity [L] |
| Power [W] |
| Accuracy [°C] |
| Thermometer function |
| Ultra Heater Pro BT 50 W | Ultra Heater Pro BT 25 W | Ultra Heater Pro BT 75 W | Ultra Heater Pro BT 100 W |
| 135075 | 135074 | 135076 | 135077 |
| 15-50 | 10-25 | 35-75 | 60-100 |
| 50 | 25 | 75 | 100 |
| 0,25 | 0,25 | 0,25 | 0,25 |
| ✓ | ✓ | ✓ | ✓ |
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