What refractometer to buy

Of note, is there is also a "seawater refractometer", which is calibrated for the specific ions in seawater. Is slightly more accurate than regular one.
 
I firmly believe the ebay saltwater aquarium ones (for less than $25) are perfectly OK as long as you calibrate with 53 mS/cm solution.
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

  • Yes!

    Votes: 32 45.7%
  • Not yet, but I have one that I want to buy in mind!

    Votes: 9 12.9%
  • No.

    Votes: 26 37.1%
  • Other (please explain).

    Votes: 3 4.3%

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