Substrates, what kind can you use with AROYA? You could use soil, rockwool or coco. We don't discriminate. Our TEROS 12 is calibrated for all of them. As a chef, it's important that you get to choose what ingredients you want to use and as a team, we want to ensure that you have the best capabilities as a grower. So with AROYA you could choose anything you want. You could start in one and finish in the other.