We went on a little 7 day vacation and despite my concerns, the DWC again proved to be "hands-free". I double-checked the water level, insured the lights remained on timers and were about 3 inches above the tops of the plants, and off we went. "No worries".
Upon our return, every thing was fine and I only had to add a gallon of water. The system can easily draw-down about 4 gallons before any problems would arise. "Peace of mind" was proven once again.
And check out the roots. Very white and very dense. This system is as efficient as the Ebb and Flow and twice as easy to build and maintain.
We will begin harvesting tomorrow!