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Aquarium Equip UP Glass Saltwater Hydrometer – Reef Soft Coral Salinity Marine Fish Shrimp sea

$12.95
Make sure this fits by entering your model number. 1. Easy to use 2. Green indicators are ideal range of water temperature and specific gravity for most salt water / marine aquariums 3. Hydrometer measures specific gravity 4. Need it for raising brine shrimp

CORISRX BEST OF YOUR LIFESTYLE Dr. Marine Saltwater Marine Aquarium Salinity Portable Refractometer Meter ATC 0~10% Reef

$63.65
This latest salinity refractometer is designed for testing the concentration of salt water and brine and used for quality control in research and clinical laboratories and marine industry. Its scale provides a direct reading of the specific gravity and concentration (Parts per Thousand) of salt in water.