The company B-Four Agro grows lettuce using the hydroponic method. The heads of lettuce, which grow in covered deep water cultures, find the ideal conditions here for quick and healthy growth. The efficient use of space, combined with a low consumption of resources, protects not only the environment but also enables the growing of lettuce at very low cost. An important component of the active hydroponic system is the sufficient supply of oxygen to the plants. This is ensured in the greenhouses of the Dutch company with an oxygen generator from Inmatec.