In a non-reactive container combine water, kosher salt, and dark brown sugar. Ensure all ingredients are dissolved.
Once well combined, add salmon to the container and ensure the salmon is submerged.
Notes
The above quantities for water, salt, and sugar are based on 1.5 lbs of salmon.If you don't have Diamond Crystal Kosher salt, use 1/2 the amount of Morton's Kosher Salt. If you don't have Dark brown sugar, use light brown sugar or white sugar.