Place the fish in a large saucepan. Mix together the water, sugar, and salt. Pour the water-mixture over the fish. The water-mixture should fully cover the fish, if it doesn't add more water. Bring the water to a boil over a medium-high heat. Boil for 3 to 5 minutes.
Remove fillets from water, and blot on paper towels to remove excess water. Brush with 6 tablespoons melted butter, and sprinkle with paprika.
Broil for 8 to 10 minutes per inch of thickness, or until the fillets are golden brown. Serve with the remaining melted butter.