re: Boiling shrimp and crabs together?

I put my water to boil and add all my seasoning. When the waters boiling I add my potatos and mushrooms if I have some. When that gets boiling I time it for 8 minutes and add my crabs boil them for 5 minutes, add my shrimp and boil them till I see and air pockets between the shell and meat then I shut it off. Let it soak till they seasoned like you like them.