The SeaQualizer ? is a device used to reverse the effects of barotrauma. The SeaQualizer is designed to release at three different depth settings (50ft,100ft,150ft). The SeaQualizer ? allows you to return the fish to a sufficient survival depth without puncturing or injuring the fish. The SeaQualizer ? is pressure activated avoiding premature release, which can happen with other tools.Through proper use, the SeaQualizer ? promotes longevity of resources for generations to come.