Two Little Fishies AccuraSea Seawater Reference Solution – 250 mL

The AccuraSea Seawater Reference Solution by Two Little Fishies is the only calibration fluid of its kind made from real natural seawater. It is micron-filtered, UV sterilized, then adjusted with reverse osmosis water to match the standard salinity of S = 35 or conductivity of 53 mS/cm at 25°C (77 °F). This solution is ideal for calibrating refractometers and hydrometers, and can also serve as a precise reference for test kits since it contains correct, well-known concentrations of all dissolved salts. Use it to ensure accuracy in salinity measurements and maintain optimal conditions in your marine or reef aquarium.

Why You’ll Love It:

• Made from real seawater, not synthetic salts

• Micron-filtered and UV sterilized for purity

• Set to a standard of S = 35 or 53 mS/cm at 25°C

• Ideal for calibrating refractometers or checking hydrometer accuracy

• Helps maintain precise salinity and water chemistry in marine systems