Hello Sajuu, Welcome to the forum. There is a classic problem with metal detecting, and many items cannot be found with current technology. The basic issue is that metal detectors actually detect the ground. The ground itself is one large target to a detector. Let's call the ground the "noise". The items you seek create the "signal". The deeper you try and detect something, the more ground there is in the way. So the deeper you try to detect, the more "noise" the detecto