Samuel Chen’s assessment of Recirculating Aquaculture Systems: a great option, but it comes down to proper management and being ready to troubleshoot and learn on your feet. While RAS has its benefits, it isn’t the crockpot of fish farming - you can’t “set it and forget it”. You have to be engaged in making the systems perform for your fish.
https://www.aquaculturenorthamerica.com/finfish/ras-and-the-promise-of-control-1991