That should be more than ample to move them into a DWC system. When your washing the roots, make sure it is distilled water because the chlorine and other metals in tap water is not kind to the plants fragile new root system, in addition to the temp of your water as close to room temp as you can so as not to shock the plant. Moving it from soil to DWC already promotes a stagnant period of growth (hydroshock) for a day or two so try to minimize damage as much as possible. With your fingertips gently move the roots back and forth through the water, shaking off all excess soil and when transferring into your new DWC system, make sure that either your solution or some kind of 100% humid vapor is able to get to your roots so it does not dry out in the first day of the plant trying to access its new food source. If you have any questions don't hesitate to ask!