AquaLife Hydrometer/Thermometer -Measures gravity and temperature of saltwater aquariums The AquaLife glass combination hydrometer and thermometer measures specific gravityand temperature of saltwater aquariums. The hydrometer measures specific gravityfrom 1.00 to 1.06, which is readily converted to salinity with a conversion table.The thermometer measures temperature from 0-40°C and 40-100°F in increments of 1°Cor 2°F. The green areas are the ideal ranges of temperature and specific gravityfor most saltwater aquariums. Readings falling on either side of the green areaindicate an adjustment of the salt concentration is necessary. Read More
