Help! My calcium level is suddenly low!

[Shirak]

I made some of Randy's refractometer test/calibration solution and check mine every few months.

 

[jmauney]

No

I made some of Randy's refractometer test/calibration solution and check mine every few months.

I haven't calibrated lately.... I'm gonna have to look up the calibration solution!

 

[jmauney]

I made some of Randy's refractometer test/calibration solution and check mine every few months.

U wouldn't happen to have a link to that would u?

 

[Randy Holmes-Farley]

Reef Aquarium Salinity: Homemade Calibration Standards by Randy Holmes-Farley - Reefkeeping.com
http://reefkeeping.com/issues/2004-06/rhf/index.htm