Van Gog Nurseries - Koen Saris - Pepper/Cucumber - Harvest House - Grubbenvorst - Netherlands

UPDATE APRIL 2026

Van Gog sent us these impressive drone photos. On the left, you can see the 16,000 m² basin, which is already equipped with 8 USAF™ DT100 transmitters and where algae growth is well under control. It, therefore, makes sense that they have decided to also treat the other 12,000 m² basin with our transmitters, especially now that the difference is so clearly visible. Furthermore, the transmitters are also being installed at two other locations in Grubbenvorst and at four locations in Germany.

“At Van Gogh's the quality of our irrigation water one of our spearheads in our policy. Hence, we do not take any chances when making adjustments to our water system.

Ultramins came our way because we have two large pools of 13,000m2 and 15,000m2 respectively and where we struggled to get and keep them free of algae and biofilm.

The technology deployed by Ultramins to combat it, cavitating ultrasound waves, was new to us and its operation unknown. We were therefore somewhat hesitant, but based on good experiences from other growers, we started with 4 USAF™ transmitters in the largest basin. After some time, we saw insufficient effect and followed Ultramins's original advice and increased the number of transmitters to 8.

We continued to treat the other basin as we always did, which takes man hours and resources. The difference between the basins was growing. In the basin where the transmitters were located we saw that the algae disappeared quickly, the bioflim also greatly reduced and have no doubt that it will also disappear completely. With that, it was clear to us that the channels work well.

The saves us a lot of time in terms of treatment and control of the water, because we don't have to worry about it now. Apart from the one-off investment and (low) energy consumption, there are no further maintenance costs.

With this this system meets our high standards and recommend other growers to also have a look at their situation with Ultramins. They think well and professionally!”