How much will it change

[trillionaire]

My tank is reading 1.021 specific gravity but the water is at 82 degrees. Once I finally figure out a way to keep it at 77 how much will this figure change. Will it go up or down? Thanks

 

[twoods71]

Your salinity will drop approximately 1 ppt.
The above number is salinity and not specific gravity which is read on the hydrometer.
The SG will drop also.