We think that it is safe to say that the second cup is officially dead. After dropping the second plant there was really no bringing it back to life no matter how hard we tried by adjusting the light, the pH and the nutrients; the leaves were too damaged to even try and rejuvenate them.
As for the first and third cup, they were beginning to brown so we decided to turn the light down to 6 hours to hopefully make the plants green and healthy again. However, we did not adjust the pH because it was at 5.9 and that is in the ideal range for hydroponic strawberries.