The startup says it has performed well in trials with rainbow trout © Paras Aqua Oy
Paras Aqua was recently listed in the Aquaculture Market Report 2025 as one of the secto's top startups and claims that its precision HFS technology, minimises the use of water, enabling cost-effective control of water temperature, even in Finland's extreme weather conditions.
According to the startup, the system doesn't require any biological water treatment, thereby offering a substantial reduction in the farm's oxygen consumption, carbon dioxide production and investment costs. Meanwhile it’s also equipped with a control system that brings precision farming conditions.
“The Precision HFS allows water quality to be controlled at the tank level according to actual demand and more accurately than before. The consistency of water quality improves fish welfare and allows more intensive water use. In the absence of centralised biological water treatment, there is no need for a water connection between the tanks. Decentralised technology thus enables the effective management of technical, biological and fish welfare risks," said Tapio Kiuru, founder of Paras Aqua Oy, in a press release.
The startup says that both experimental and production-scale tests on rainbow trout and European whitefish have shown that the fish grow very well, mortality is low, and the feed conversion ratios are excellent.
The system's chemical-free wastewater treatment also ensures efficient nutrient recovery. Production costs are further reduced by the absence of the need for depuration before the fish are sold.
“In addition to low mortality, other preliminary findings on fish welfare, such as fin health, have been very promising and have encouraged the introduction of this technology into production. We firmly believe that with the right technological choices, production efficiency, environmental benefits and ethics can be combined," said Jani Pulkkinen, chief research officer at Paras Aqua.
“After years of development, our technology is finally ready for production. We are proud to be able to offer a new alternative to environmentally friendly fish farming," said Kalle Sinisalo, CEO of Paras Aqua.
