We managed to break the skepticism of the owner of the company Russian Nevod and one of the largest suppliers of fish and fish products in Russia, Aleksandr Pavlov, about RAS, and invite him to a meeting with our South Korean partners. Korean specialists told about high-density technology for fish production in recirculating aquaculture systems, which makes it possible to shorten the payback period and reduce losses by up to 3 percent, without the use of any drugs.