Werner Gaus sold and commissioned the first industrialized module for intensive indoor eel farming. in Denmark. This was one of the smaller scale demonstration factory units. The total holding water volume was 150m³. The total annual output reached 30 tons of eel (about 180,000 pcs.).  

Werner Gaus was invited by the City of Waren in Eastern Germany to renovate a circulating water treatment system for an indoor trout and sturgeon breeding plant to increase the existing production and to improve the safety level. The plant concrete structure breeding tanks had an annual output reaching 200 tons of trout in a holding volume of 1000m³ water, sturgeon in 500 m³ water, with an annual output of 50 tons, and a number of salmon fry to be released in the rivers in a small system holding 200m³ water.  

e was invited by the National Iranian Ministry of Fisheries (Shilat) to deliver and commissioned five sets of indoor RAS farms in Rashd (near the Caspian Sea), and Yasud (Southern Iran). For this system, he developed a new farming model - large cement breeding tanks in race-way design in combination with a high-performance water treatment system. Two sets of them were used for the nursery and breeding 5,000,000 of sturgeon fingerlings; two sets were used for the breeding of Caspian salmon, with an annual output of 5 million salmon fry. All fingerling and fry are produced to be released into the Caspian sea or the rivers flowing in to it. Last set was to produce trout with an annual output of 500 tons. 

Werner Gaus was challenged to design and commission the world's first indoor RAS Ayu farm in Taiwan, China with an annual output of 100 tons holding 700m³ water. This plant was specifically designed to withstand earthquakes.

Werner Gaus helped to build China's first indoor recirculation aquaculture vannamei farm in Xiaotangshan, Beijing, China. At same time, the Japanese Hazama Gumi, a Japan's semi-state enterprise, agreed to acquire and establish the World’s first RAS farming system for the vertical farming of shrimp from Werner Gaus and a long lasting R&D co-operation period was bearing the fruits of all efforts when this technology finally was internationally patented and approved in 2003 with the patent number: JP2003023914. During this time, the “Litopenaeus vannamei” was introduced by Werner Gaus to Japan the first time as a live species and received national certification for the import of the white shrimp to be cultured in Japan in RAS systems from thereon.  

Werner Gaus with his solid and renowned aquaculture knowledge has reduced most of his activities to teaching and consulting as a RAS specialist in all aspects of modern aquaculture. He consults well known companies like the German based Turkish company “INKAS Bau GmbH” for their Aquaculture projects in Turkey. 

Present Mr Werner Gaus joined a Xiamen start-up company, Xiamen RecircInvest Biotech Co., Ltd.) as Chief Technology Officer (CTO) to build a RAS demonstration site in Haicang Industrial Park, Xiamen City, China to begin China and global promotion of his mature RAS technology. This Haicang demonstration site has both the indoor double-layer, multi-species fish grow-out system and the indoor 3D, tri-level, 36-tank sea cucumber (flat fish) grow-out system on display. Both systems do not occupy more than 400 square meters of factory space. Both systems were commissioned toward the end of 2013 with successful growing of many high-end commercial fish species such Giant Group (GG), Tiger GG, Leopard Coral Grouper, Jade Perch, etc. and sea cucumber. Both systems can be flexibly tuned to grow either saltwater or freshwater species. Fish grow-out system can comfortably produce 40-50 tons of output per year. The sea cucumber system is designed to produce four seasons, all year round, 22.7 tons of output per year. Xiamen RecircInvest Biotech Co. is now gaining extensive attention from all levels of governments in China, RAS experts, fisheries research institutes, and various private and public enterprises, and has started working as the official scientific research and experimental base for Fujian Institute of Oceanography (FIJO). FIJO is the one and only authorized fishery and oceanographic training organization for over fifty under-developing countries in the world for China.