The older model Sand Shark was my first waterproof machine, and I found more gold with it than with the Excal I subsequently bought. It's a lightweight, easy to learn, deep hitting machine that is unaffected by mineralization, at least here in Virginia Beach. But please hear this: with no discrimination, the secret to happy hunting with any PI is proper scoop selection. PI's easily locate very small targets that can slip through the generic scoop with 3/8" holes, making recovery a tiring and frustration experience. Your scoop should have smaller holes to catch those targets. The scoop should also be as large as you can handle, to make recovery in the surf as much of a "one scoop" proposition as possible. Quick recovery means much less work. Moral of this story: When your weapon forces you to shoot at everything, you should strive to make your shooting as efficient and accurate as possible. Do this, and you'll continue to enjoy the very real benefits PI hunting .
That said, I've recently repented from the sale of my first Sand Shark that was brought about by my failure to heed the above scoop advice. And now, after wandering in the VLF desert for for the past two years, I've again seen the light and just last week took receipt of my brand new Sand Shark. I expect to have a busy and productive summer at the beach!