Hanna Salinity checker

Charlie’s Frags

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So today I bought the Hanna salinity checker and it 1.029. I also tested with my 2 calibrated refractometer and the measure 1.026. Which should I trust?
 
Never mind. It’s spot on with refractometers now. Apparently I didn’t calibrate the Hanna correctly the first time.
 

WHAT IS THE LOUDEST PART OF YOUR REEF SYSTEM?

  • Return pump

    Votes: 4 4.9%
  • Powerheads or wavemakers

    Votes: 6 7.3%
  • Protein skimmer

    Votes: 17 20.7%
  • Overflow or drain

    Votes: 24 29.3%
  • Sump vibration or plumbing

    Votes: 1 1.2%
  • Cooling fans

    Votes: 9 11.0%
  • Dosing, ATO, or other equipment

    Votes: 4 4.9%
  • Nothing. My reef is surprisingly quiet

    Votes: 11 13.4%
  • Other (Tell us what makes the noise)

    Votes: 6 7.3%
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