Question about mixing marine water

[Petoj87]

Hi this is my first post to this forum!

I have a question about mixing marine aquarium water i have a D-D Salinity Refractometer when i look inside it it says Salinity/S.G Seawater 20C..


Does that mean i should measure me water at 20C or at the 25C i have in my aquarium?

 

[MitchReef]

Just test it as it is....that is just stating the scale they use, and temperature effects are minimal at the variance you are noticing....