Sicce JOLLY 10W Submersible Heater User Manual
Quick guide for the Sicce JOLLY 10W submersible aquarium heater, covering installation, safety precautions, operation, maintenance, and troubleshooting.
Table of contents
Quick guide from the manual
The Sicce JOLLY is an automatic, fully submersible plastic heater designed for indoor fresh and marine water aquariums, paludariums, and turtle tanks. Important: Never operate the heater outside of water. Always disconnect all aquarium appliances before performing installation or maintenance.
Installation

- Check the heater label to ensure the voltage matches your power supply.
- Attach the suction cups to the heater.
- Place the heater inside the aquarium in a position with good water circulation, preferably near a source of water movement to ensure even heat distribution.
- Do not plug the heater into the power supply until it is fully submerged in water.
- Ensure the heater remains submerged at all times.
Operation
The heater increases water temperature according to the capacity of the aquarium, room temperature, and desired increase (refer to Table 1 in the manual). The LED on the tube indicates the heater status:
- LED ON: Heater is in operation.
- LED OFF: Thermal protection is activated.
When the heater is removed from the water or reaches its maximum temperature, the thermal protection automatically switches it off after a few minutes. For safety, unplug the heater and let it cool for at least 15 minutes before removing it from the water.
Maintenance
The heater requires no maintenance other than periodic cleaning of the tube to remove salt incrustations and algae. Use only water and vinegar for cleaning. Do not use chemical cleaners, solvents, or acids. Do not disassemble the heater or pull on the power supply cable.
Safety
- If the appliance shows signs of abnormal water leakage, immediately unplug it.
- Maximum operating depth is 1 meter (3 feet).
- Use a drip-loop (fig. 1) for each cord connecting an aquarium appliance to an outlet to prevent water from traveling along the cord and contacting the outlet.
- If the plug or socket gets wet, do not unplug the cord. Disconnect the fuse or circuit breaker supplying power to the appliance first.
- This appliance is not intended for use by persons with reduced physical, sensory, or mental capabilities unless supervised.
- The power cord cannot be replaced; if damaged, the appliance must be discarded. Never cut the cord.
Practical help
Common problems
Check if the thermal protection has been activated. Ensure the heater is fully submerged and the power supply is active.
Immediately unplug the device. Do not attempt repairs; the unit must be discarded.
Do not unplug the cord. Disconnect the fuse or circuit breaker supplying power to the appliance first, then examine for water.
Before use
- Verify voltage on the heater label matches your power supply.
- Ensure the heater is fully submerged in water before plugging it in.
- Attach suction cups securely.
- Position the heater near a water movement source.
- Create a drip-loop for the power cord.
Specs in practice
- Maximum depth
- The heater must not be operated at a depth greater than 1 meter (3 feet).
- Temperature increase
- The heater increases water temperature by a maximum of 4°C/40°F.
Images and diagrams
- Fig. 1 illustrates the 'drip-loop' configuration, where the power cord is positioned below the level of the outlet to prevent water from dripping into the socket.
Model compatibility
- Suitable for indoor use only.
- Designed for fresh and marine water aquariums, paludariums, and turtle tanks.
- If the aquarium size is larger than indicated, combine multiple heaters.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.