Hikari AccuProbe Aquarium Hydrometer, Mini

Description

Limited Range Specific Gravity Meter for Marine Aquarium Use. Perfectly sized for Nano aquariums. Accurate to 0.001 specific gravity and salinity (PPT) measurements.
Ideally suited for use in Nano tanks, smaller setups or sumps of larger systems
Accurate to 0.001 specific gravity and salinity (PPT) measurements
Durable construction for extended life
Designed to give a temperature-corrected reading in warm water aquariums – 68°F to 85°F (20°C to 30°C)
Readings can be taken by taking the meter out of the aquarium and placing on a level surface or leveling the unit in the substrate