I always salt the fish myself. To do this, mix salt with sugar in a ratio of 3 to 1 (more salt than the fish needs, it will not take, salt boldly), sprinkle the fish well with vodka (cognac, whiskey or tequila – what is available), sprinkle it with a mixture of salt and sugar, cover with cling film and send it for a day to refrigerator. After a day, wash off the salt and dry with a paper towel.