Environmental techologies company. ECO-TEC is a Durban, South African based group specialising in the development and manufacture of small domestic to medium industrial ozonation systems and accessories. Discover why ozone is the leading technology of the 21st century for improving the environment. Drinking water treatment, rainwater harvesting, reverse osmosis and filtration, industrial and municipal wastewater treatments, water reclamation, sewage treatment, cooling tower water treatment, agricultural, food processing, and marine aquaria and freshwater fish farming aquaculture, odour control, air purification, and medical applications are among countless areas where ozone treatment has been shown to have exceptionally beneficial effects.