Gia talks about retrofitting existing hydro units, adding generation to non-powered dams, and installing the RHT in Africa in collaboration with MyHydro on POWER Magazine's podcast.
https://www.powermag.com/fish-friendly-hydro-natel-energy-is-proving-its-possible/
This article from the Water Power Technologies Office includes a photograph of Natel's technology and encourages the adoption of turbines that are safe for fish to pass through.