We have had a tray field for seven years now. The water shortage two years ago gave us the idea to collect and reuse the water from the tray field on our farm. Now, the water from the tray field is collected in a 4,000 m³ tank and then purified. The water we collect, with its nutrients and plant protection products, passes through a slow sand filter and is then reused in our substrate cultivation. As well as collecting our tray field water, we also have a 9,000 m³ rainwater collection tank. This means our farm does not depend on groundwater, and at the same time we can meet the stringent requirements in terms of emissions of effluent.