Refractometer

What does Refractometer mean?

A refractometer measures the refractive index of saltwater to determine salinity. The reef-keeping standard tool for checking SG. Calibrate monthly with a 35 ppt calibration solution.

How is Refractometer used in aquariums?

Calibrate monthly with a 35 ppt calibration solution. Place 2-3 drops of tank water on the prism, close the cover plate, hold up to light, read the SG line on the scale. Cheaper than the alternative (digital salinity meters cost more, hydrometers drift).

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Frequently asked questions

What does Refractometer mean in fishkeeping?

A refractometer measures the refractive index of saltwater to determine salinity. The reef-keeping standard tool for checking SG. Calibrate monthly with a 35 ppt calibration solution. Place 2-3 drops of tank water on the prism, close the cover plate, hold up to light, read the SG line on the scale. Cheaper than the alternative (digital salinity meters cost more, hydrometers drift).