Aquarium Soultions Hydometer (testing specific gravity)
• Includes salinity and specific gravity scales
• Easy to use
• Certified Calibration, Accurate to +- .001 specific gravity
• Durable clear plastic, not easily broken like glass hydrometers
• We suggest “breaking it in” by filling with saltwater and letting it sit for a few hours, then rinsing well with clean freshwater after each use.