Hydrometers & Refractometers
Hydrometers and refractometers are instruments used to measure the specific gravity of your saltwater or the ratio of the density of the liquid to the density of the water. Bulk Reef Supply carries the Red Sea Hydrometer with Integrated Thermometer and the Milwaukee Digital Seawater Refractometer.
Special Price: $6.79
Special Price: $6.79As low as: $6.49
Special Price: $19.54
Special Price: $33.99