https://www.hamzasreef.com/Contents/Calculators/
There's every salinity calculator you'll ever need (and a handful that you never will).
For your situation, you can use this calculator:
https://www.hamzasreef.com/Contents/Calculators/SaltwaterTopOff.php
There's every salinity calculator you'll ever need (and a handful that you never will).
For your situation, you can use this calculator:
https://www.hamzasreef.com/Contents/Calculators/SaltwaterTopOff.php