Calibrate??? hmmm...

Where can I buy this?

LFS
Any solution meant to calibrate to 35ppt will do you fine

Well thanks for the replies. So is this solution only available at LFS or anywhere else? The store here would have the deer in the headlights look if I dared to ask.

J&L

I have a bottle of it that I use to calibrate mine once a year, J&L sells it. http://www.jlaquatics.com/product/pp...+Solution.html Or just drop in some time and bring your refractometer with you.

Just in case anyones interested

http://reefkeeping.com/issues/2006-12/rhf/index.php

I have a Sybon refractometer, and have only used the supplied 0 ppt solution to calibrate. I have never had to adjust it. But maybe I should get some of that 35 ppt solution to double check.

I have a sybon, I have calibration fluid and it reads the same if I calibrate it with RODI or the pure water that came with the sybon when I check it with the calibration fluid.

I got some 35 ppt calibration fluid yesterday, and just checked it with my Sybon refractometer. It was bang on perfect. I had previously only checked it with the supplied 0 ppt ultrapure water fluid but have never had to adjust it. Now with the 35 ppt fluid, glad to see that it is accurate at both ends.

I've had the refractometer now for over 3 years, and use it often with water changes and with my QT tank. Not sure how they can get out of calibration, but mine has stayed true the whole time.