I can't say for certain if that will happen or not but I can say that it isn't suppose to. From what I have gathered the roots do grow large but nothing like in an NFT or DWC systems. In a DWC system the water level should be lower than your netpot as I am sure most of us here know. We do this to help encourage root growth, and it can also help in root rot prevention. With an NFT system roots follow the water as is runs, when the water stops the roots go looking. The NFT systems that are similar to aero systems irrigated by a pump and sprayer I mean, the roots follow the drips down to the bottom of the tank.

With a true aero system the mist is fine enough that it is absorbed very fast through the root pores. The mist is also on only long enough to feed the roots, and NOT SATURATE them causing drips. If there is no water for the roots to try and stretch to then they won't stretch. Once you fined the right watering schedules (be it 30sec. ON/ 3min. OFF, or 40sec. ON/ 2,in. OFF) the roots will never starve for water/nutes, and will never need to go searching for water.

I think I said all that right, and it really makes a lot of sense when you think about it.

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