The Aqua One 10W Nano Preset Heater is a compact, fully submersible aquarium heater engineered specifically for small desktop aquariums, nano setups, and Betta tanks (up to 10–15 Litres). Factory pre-set to a tropical 25°C, it automatically maintains a stable water temperature without requiring manual thermostat adjustments . Equipped with a built-in electronic thermostat and an LED operational indicator light that illuminates when actively heating, its ultra-short casing mounts discreetly using integrated suction cups to conserve swimming space .
