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  1. Reefing Equipment
    I just got calibration fluid in the mail for the TDS meter I bought awhile back. I dipped my meter in distilled water and it read 0 ppm. I dipped it in the calibration fluid and it reads 783 ppm and the fluid is 1000ppm. There's no where for a screw driver to go into this TDS meter soooooo...
  2. General Reef Discussion
    Has anyone used a refractometer that they like and would like to recommend one to me? I browse through ebay and found this LINK Has anyone ever use this one before? If so, how did you like it? How does it compare to the higher quality refractometer?
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