"Susan" wrote in message .. .
I have alot of expensive inverts. so I try to keep it fairly accurate. I
agree though, as long as everybody looks happy in your tank you should be
safe.

Why would you care to keep it so stable and "acurate" if even
in the ocean itself, salinity and temperature fluctuates a lot?

Check these two articles out:
http://www.reefland.com/rho/1105/reefc7.php
http://www.reefland.com/rho/0106/reefc8.php
What is your conclusion from the reading ?