temperature vs salinity

dib · Oct 11, 2013

Ok, so I know the salinity changes a bit with the temperature but which way. Basically, if my water change trash can is cooler water to start will the salinity be lower or higher. Trying to get the salt mix right as the heater is warming up the water

redfishbluefish · Oct 11, 2013

Most of the newer hand-held refractometers have automatic temperature compensation. Look to see if your refractometer has the ATC letters on it.

Anyway, to answer your question, HERE is an article by Dr. Randy Holmes Farley. You might wish to first look in “Temperature and Refractive Index,” for a concise explanation.

Tahoe61 · Oct 11, 2013

The higher the temperature the higher the SG value.

Salinity & Specific Gravity

mike007 · Oct 11, 2013

When you do your water changes try to match the same temp as your display tank. Then test to see if your salinty is the same.

dib · Oct 13, 2013

I don't have anything fancy, I just use a hydrometer. And yes I wait for the temps to be right. I just find myself having to add more salt. Whish there was an Easy Button....lol. thanks