FYI - Refractometers

[KAiNE]

I recently got a conductivity meter and was surprised at the difference it showed in my salinity.

What i thought was 35ppt was really like 32.5ppt. Check this thread out for more info - http://www.reefcentral.com/forums/showthread.php?s=&threadid=953605

 

[crumbletop]

nice thread. Guess I'll add some calibration fluid to my next drygoods order

 

[KAiNE]

Yea.. i was surprised.
I have 2 swing arm hydrometers... one reads 38ppt the other 42ppt when they should say 35ppt.
Glad i never relied on them!