Death Bubba (3lb experiment)

Girls have finally settled into their nutrient regime. They have come back from lock-out the previous week, after a flush and re-dosing the nutrients. My nutrients were mixed to a 70L ratio this week, up from a 65L ratio last week. Daily maintenance of the reservoir is adding about 1L of water and PH down. Res starts and raises from 5.8 - 6.2 by the next afternoon like clockwork. Perhaps the air stone in the res, along with aeration dripping through the hydroton and piping is adding to this, along with the plants feeding. This does not worry me.