Regularly checking oxygen levels in the water process pays off. 'On one side of the greenhouse, an unusually low oxygen level in the water was measured. Erwin Gräfe from Sendot came to investigate. Using the company's oxygen sensor, only 55 percent oxygen in the irrigation water was measured on one side of the greenhouse. Although this measurement is taken at the end of the drip hoses, which are now designed to prevent clogged drippers, Robert explains, 'The release from this new type of drippers is reliable.'
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