Plastic hydrometer for aquarium salinity testing in seawater fish tanks featuring a wide base for stability and clear accurate readings from 1 000 to 1 030 specific gravity
Plastic hydrometer for aquarium saltwater tanks measuring salinity and specific gravity with swing out pointer for easy reading designed for marine and seawater fish tanks
RASTKY Aquarium Glass Salinity Meter Accurate Hydrometer Tester for Fish Tank Specific Gravity and Salinity Detection Lightweight and Durable Auto Recognition Material Plastic, Suitable for Aquarium
Seawater Hydrometer for Aquarium Saltwater Salinity Meter, 1.000-1.030 Specific Gravity with -Corrected Readings, 0-40 PPT Range, Clear Plastic Marine Tank
Seawater Hydrometer for Aquarium Fish Tank Saltwater Salinity Meter 1.000-1.030 with Temperature-Corrected Readings, Clear Plastic
