Two sizes for versatile tank fit - L size: approx 26.5 cm (10.43 in) long - S size: approx 20 cm (7.87 in) long - Measuring range: SG 1000-1040; temperature 0-40 C (32-104 F) Designed for marine environments - For marine aquariums, with use in mariculture and other water-based applications - Built-in thermometer measures both water temperature and salt content (specific gravity) Clear guidance at a glance - Green indicators show the ideal range for water temperature and SG for most saltwater aquariums Practical uses and scenarios - Home saltwater reef or nano tanks: monitor temperature and salinity to maintain stable conditions for livestock and corals - Small-scale mariculture systems: track water quality to support healthy growth and reduce stress on aquatic species - Quarantine or hospital tanks: quickly verify that temperature and salinity stay within safe ranges during treatment or observation Key attributes at a glance - Function: combines temperature and salinity measurement in one device - Compatibility: suitable for marine aquariums, mariculture setups, and similar environments - Size options: L and S to fit different tank sizes and configurations - Performance indicators: green range indicators simplify monitoring and reduce guesswork This product provides essential, at-a-glance monitoring of temperature and salinity for marine environments, helping you maintain stable conditions with minimal effort.