hygger 25W Small Submersible Aquarium Heater for 2-5 Gallon Tanks — LED Display, Adjustable Temp

Compact, reliable heating for small aquariums

Designed for tiny to mid sized setups, the hygger 25W submersible heater combines a slim profile with dependable warmth. Its subtle footprint makes it easy to hide behind decorations, while delivering stable temperatures in 2-5 gallon freshwater and saltwater tanks, as well as small turtle and planted habitats.

Smart monitoring at a glance

The built in LED display presents real time water temperature and heating status. When the heater is actively warming, the indicator glows red; once the target temperature is reached, a green light confirms comfort levels are maintained. This helps you stay informed without opening the tank.

• Slim, space saving design that fits behind decor, filter housing, or rocks
• Two strong suction cups provide secure mounting in tight spaces

Flexible control you can trust

You can set the temperature anywhere from 59°F to 93°F in 1 degree increments. A memory function remembers the last setting, so you resume quickly after power interruptions without re adjusting the knob or dials.

• Wide adjustable range supports diverse freshwater and saltwater needs
• Memory keeps your preferred setting for fast restart

Safety and durability in a compact body

Automatic shut off helps prevent overheating by stopping operation when the water level or submersion is not optimal. A shatter resistant guard protects delicate inhabitants while adding peace of mind for busy setups. The heater is built from rugged materials including a quartz tube and high impact housing to withstand daily tank life.

Real world use and setup tips

Perfect for 2-5 gallon tanks, whether you keep a betta, a small planted tank, or a nano reef fragment. For best results, place the unit behind rockwork or driftwood to stay discreet while keeping the water temperature stable. Regular checks with the LED readout help you catch shifts early and respond with minor adjustments as needed.

Key benefits at a glance

• Low profile, easy to conceal in small aquariums
• Clear LED display for real time temperature and heating status
• Wide 59 93 F range with precise 1 degree steps
• Memory function preserves last temperature after power loss
• Safety features including auto shut off and submersion detection