Question about salinity and temperature

[barclayrl]

I am planning on setting up an automatic water changer on my sump and have a question.

The “New� saltwater holding tank I have (40 Gallon brute trashcan) does not have a heater in it (Nor do I want to pay to heat it). I was planning on using an aqualifter pump to pump in about 2 gallons of water each day. The basement is at about 60 Degrees and the floor could be colder, my question is:
When making my new saltwater, does it matter if the temperature of the ro-di water is 50-60 degrees?

Does salinity fluctuate with heat?

Thanks!
Ryan

[Bonebrake]

Salinity (measured in ppt) doesn't change with temperature, but specific gravity (dimensionless) does change with temperature and/or pressure.

Adding two gallons of water at 50-60 degrees will not appreciably change your specific gravity in your system, so don't worry about it.

[barclayrl]

Ok, that makes sense baout adding it to the system but, what about getting the 40 gallons of cold water at 1.025? If I get it to 1.025 at 60 degrees, will it be different if heated up to 80.. I just dont want to spike up the salinity in my tank.. I guess i could mix up a batch a cold temperature, get the salinity at 1.025, then heat it up to 80 and see if the salinity changes.

PS thanks for the PM!!

Ryan

[HowardW]

<<< what about getting the 40 gallons of cold water at 1.025? If I get it to 1.025 at 60 degrees, will it be different if heated up to 80. >>>

It will read about .003 lower on S.G.

[barclayrl]

Originally posted by HowardW
<<< what about getting the 40 gallons of cold water at 1.025? If I get it to 1.025 at 60 degrees, will it be different if heated up to 80. >>>

It will read about .003 lower on S.G.

Just to confirm, So when making my new 60 degree saltwater, i should initially make the salinity 1.022??

Ryan

[Boomer]

This will make it allot easier for you

http://www.reefkeeping.com/issues/20...conversion.htm

or

http://www.hamzasreef.com/Contents/Calculators/