how to boil perfect shrimp

This recipe is perfectly timed so you will not over or under cook shrimps for shrimp cocktail or salad with or without the spice but salt and water are exact.
This recipe is only good for 30-36 count shrimp. Larger shrimps will take more time and smaller will take less.

3 c. water,
crab boil add more if you like very spicy.
1&1/2 T. sea salt,
1/2 lb. shrimps 30-36 count per lb.

Read this link for shrimp information.--http://phillyseafood.com/news/?pid=110811