Red Sea Fish Pharm ARE12010 Hydrometer with Digital Thermometer for Aquarium
Red Sea the most basic water quality parameter in a saltwater aquarium is the salinity. The unique, patented design of hydrometer enables the hydrometer to be installed permanently inside the aquarium or sump giving a continuous real-time reading of S.G. in addition to being used as a regular hydrometer for periodic S.G. measurements. This hydrometer also includes a digital thermometer.