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2. Marine aquarium - Wikipedia

   en.wikipedia.org/wiki/Marine_aquarium

   A marine aquarium is an aquarium that keeps marine plants and animals in a contained environment. ... After testing the pH, salinity, and temperature of the water in ...

3. Refractometer - Wikipedia

   en.wikipedia.org/wiki/Refractometer

   In marine aquarium keeping, a refractometer is used to measure the salinity and specific gravity of the water. In the automobile industry, a refractometer is used to measure the coolant concentration.

4. Salinometer - Wikipedia

   en.wikipedia.org/wiki/Salinometer

   A salinometer. A salinometer is a device designed to measure the salinity, or dissolved salt content, of a solution.. Since the salinity affects both the electrical conductivity and the specific gravity of a solution, a salinometer often consist of an ec meter or hydrometer and some means of converting those readings to a salinity reading.

5. Brackish-water aquarium - Wikipedia

   en.wikipedia.org/wiki/Brackish-water_aquarium

   A brackish-water aquarium is an aquarium where the water is brackish (semi-salty). The range of "saltiness" varies greatly, from near freshwater to near marine and is often referred to as specific gravity (SG) or salinity. Brackish water aquaria is a popular specialization within the fishkeeping hobby.

6. CTD (instrument) - Wikipedia

   en.wikipedia.org/wiki/CTD_(instrument)

   The instrument is a cluster of sensors which measure conductivity, temperature, and pressure. Sensors commonly scan at a rate of 24 Hz. Depth measurements are derived from measurement of hydrostatic pressure, and salinity is measured from electrical conductivity. [1]

7. Artificial seawater - Wikipedia

   en.wikipedia.org/wiki/Artificial_Seawater

   The tables below present an example of an artificial seawater (35.00‰ of salinity) preparation devised by Kester, Duedall, Connors and Pytkowicz (1967). [1] The recipe consists of two lists of mineral salts, the first of anhydrous salts that can be weighed out, the second of hydrous salts that should be added to the artificial seawater as a solution.