- Known as the Fishcon Fish lock or 2-chamber organism bypass or "FishLocks", combines ecological water protection with sustainable use of hydropower. It consists of two chambers with slide gates to the upstream and downstream water, a pipe bend that connects the chambers and a turbine or throttle device, which is located in the connecting pipe bend and limits the flow. The technology is based on a patented hydraulic interconnection of two lock chambers operated in opposite directions. This mode of operation enables fish to swim in continuously from both sides and prevents the intermittent operation that occurs with a conventional fish lock or fish lift. This leads to an increase in effectiveness and, in addition to the fish ascent, also enables fish to descend at the same time.