High density growing II

The plants in the bus tub ebb and flow system are still in the root development stage but are doing well also. They are receiving about four hours of direct sunlight each day with indirect light for the remainder of the day.
The TDS is about 1000 with a pH of 6.5, however, I can see by the daily reading that the plants are taking in more water than nutrients. I expect to see more growth when the nutrient level begins to drop. Time will tell...