API AquaSpin, 3 Minute, Automatic, 8 Parameter, Tester! Apogee Par Meter?

My lfs has one of those . It seems to have lower readings than my hanna checkers . If my hanna says dkh is 8.5 aquaspin will read 7.9 . I don't know witch one to believe. I started staying somewhere in between the to readings for alkalinity and calcium
 

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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