Here are some basic tips to help you enjoy and profit from detecting on the beach and sand:
TIP #1
While all-round detectors have led good finds, to be really successful in beach metal detecting you need a specialized detector. Using normal metal detectors make it more difficult to find valuable targets in a sandy, wet environment.
If beach metal detecting is/is going to be your main focus in metal detecting then acquiring a purposed designed detector will make your hobby more enjoyable and profitable.