1. Pour oil to a depth of 3 inches into a Dutch oven; heat to 350º. Whisk together milk, egg, and 1/4 cup water in a large bowl.
2. Sprinkle fillets with seasoned salt. Dredge fillets in flour; dip in milk mixture, and dredge in flour again. Fry fillets, in batches, in hot oil 3 minutes on each side or until golden brown. Drain on a wire rack over paper towels.