I'm a first time user of earthboxes for tomatoes. The earthbox version I have has a top section that has two wells going down into the reservoir (the bottom section) - these wells are slotted on one side and packed with soil - the idea is that this is the path for water to the roots. In addition the top section has numerous holes on the bottom for, what I understood, was the aeration of the soil from below. However what I'm finding, and not suprisingly at that, is that the tomato roots have found these numerous holes and have grown down into the reservoir. My question is - is this normal and is there any reason to be concerned with the roots sitting in the water? Isn't that more or less the concept of hydroponics?