Sicce Jolly 10W Pre-Set Heater

The Sicce Jolly 10W Pre-Set Heater is a compact, fully submersible aquarium heater designed for nano tanks and small bowls. Built in Italy with Sicce's signature reliability, the Jolly is factory pre-set to 78°F (26°C) so there is nothing to calibrate, just plug it in and let it run. Safe for both freshwater and saltwater use.

Looking for a different size? See the Sicce Jolly 20W for 4 to 10 gallon tanks, browse all aquarium equipment, or compare other nano-tank heaters like the Eheim Jager TruTemp 25W.

Features

• Pre-set to 78°F (26°C), no dial to adjust or thermometer to calibrate
• Fully submersible, mount vertically or horizontally
• Shock-resistant plastic body, no glass tube to crack
• Built-in safety thermostat with automatic shut-off
• Suction-cup mount included
• Ultra-compact form factor, ideal for nano and pico aquariums
• Made in Italy by Sicce

Specifications

Which Sicce Jolly Is Right for You?

• Sicce Jolly 10W (this listing) for nano tanks roughly 1.5 to 4 gallons
• Sicce Jolly 20W for small tanks roughly 4 to 10 gallons

For larger aquariums, browse our full Equipment collection, including titanium options like the IceCap 50W Titanium or the Eheim Jager 125W.

Recommended Pairings

• Squeaky's Digital Thermometer to verify tank temperature at a glance
• IceCap Magnetic Heater Mount for a cleaner installation
• Hydros Magnet Mount Temperature Sensor for smart monitoring
• Water testing supplies to keep parameters dialed in

FAQ

Can I adjust the temperature?
No, the Jolly is factory pre-set to 78°F (26°C), which is ideal for most tropical freshwater and marine aquariums. If you need a different setpoint, look at the Eheim Jager TruTemp 25W or pair an unregulated heater with a controller like the IceCap Heater Controller.

Is it safe in saltwater?
Yes, the Jolly is rated for both freshwater and saltwater aquariums.

Will 10W be enough for my tank?
A rough rule of thumb is 3 to 5 watts per gallon for moderate heating. The 10W Jolly is sized for nano tanks up to roughly 4 gallons in a typical room. If your room runs cold or your tank is larger, step up to the Sicce Jolly 20W.

Does it shut off automatically?
Yes, the built-in thermostat cuts power once the water reaches the pre-set temperature and re-engages as the tank cools.