Compact heater designed for small desktop fish tanks that maintains a stable 26°C without manual adjustments. Key benefits Spacesaving size: 5 cm long and 18 mm in diameter fits neatly into small desktop aquariums without taking up unnecessary room. Constant temperature control: builtin intelligent chip automatically holds the water at 26°C, reducing stress for temperaturesensitive species and removing the need to fiddle with settings. Safety protection: internal thermal sensor prevents dry burning if the heater is removed from water, giving added protection during cleaning or transport. Efficient heat transfer: filled with black gold sand to concentrate heat and promote efficient energy conversion, helping the heater reach and keep target temperature with lower wasted energy. Main features and specifications Dimensions: 5 cm length, 18 mm diameter — optimized for compact tanks and desktop setups. Temperature: fixed automatic control at 26°C via intelligent chip. Safety: builtin thermal sensor for dryburn protection when out of water. Filling: black gold sand for improved heat gathering and energy efficiency. Intended use: small desktop fish tanks (suitable for compact aquariums where a lowprofile heater is needed). How it solves common problems Eliminates guesswork and manual adjustments by holding a steady 26°C, helping maintain stable conditions for tropical fish and invertebrates. Small footprint avoids cluttering limited tank space or disrupting aquascapes. Reduces risk of heater damage or hazards during handling because of the dryburn protection. Improves heating efficiency so the unit can maintain target temperature without excessive energy use. Practical use scenarios Office desktop aquarium: keeps a small tank at a steady temperature for a betta or a few small tropical fish without dominating desk space. Quarantine or hospital tank: compact size and automatic control make it easy to maintain consistent conditions for shortterm treatment or observation. Shrimp or nano planted tanks: low profile fits into tight layouts while providing stable warmth for sensitive invertebrates. Installation and operation notes Designed for use submerged in small tanks; the intelligent chip controls temperature automatically at 26°C. Safety sensor protects the heater if it is removed from water; always follow general aquarium safety and manufacturer handling instructions.