I used to do this as well but it is much better to calibrate with a known 35 ppt solution such as the pinpoint one listed above.
Using 0 ppm RODI water to calibrate my refractometer, my salinity was acutally at 1.028 when the refractometer was reading 1.025. Didn't know this until after I had used the pinpoint solution to calibrate.
Where can I buy this?
__________________ Ashr Red Sea Max 250, 66g Mixed Reef
12-08-2013, 11:20 PM
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