- Aug 18, 2003
- Reaction score
Barely used mostly checking to make sure Apex is accurate- very accurate - including 4 packs of calibration fluid.
Designed for Simple Aquarium Salinity Testing Hanna Instruments HI98319 Marine Salinity Tester measures electrical conductivity (EC) to determine the salinity of natural and artificial seawater. Within seconds, the salinity and temperature are measured, and then using the temperature reading...