I also have fish in there too
If you're baking them whole, I'd say at least 45 min and rinse them down with water and wrap with foil to keep them moist.
Preheat oven to 500 degrees.
Wash a russett/Idaho potato,dry.Bake potato for 1 Hour.
remove from oven,split,and garnish with either Olive Oil,Butter,or sour cream,freshly ground black pepper,Sea Salt and Chives or minced Italian flat Leaf parsley.James Beard genious at hand.Viola!