salinity and dissolved oxygen

[aliyesami]

can anyone tell me the range of these two things should be measured in an reef aquarium ?
also is there a formula available to convert specific gravity to conductivity

regards

 

[Randy Holmes-Farley Verified Community Expert]

Salinity by conductivity, refractive index, or density (hydrometer) are easy and important to measure.

Dissolved oxygen is not very useful for most folks. It is very rare for reefers to measure it.

I do not know of a simple formula to convert specific gravity to conductivity, but I have tables in some articles that show the relationships for seawater. What exactly are you trying to do?

Table 1 in this article shows salinity, specific gravity, conductivity, and refractive index all together:

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

 

[Randy Holmes-Farley Verified Community Expert]

Here are some articles on O2, but I just caution that I think Eric had a systematic error in some of his O2 measurements:

http://reefkeeping.com/issues/2005-06/eb/index.php
http://reefkeeping.com/issues/2005-07/eb/index.htm
http://www.reefkeeping.com/issues/2005-08/eb/index.php