Ph going in 6.0
Ph going out ~5.8
Tds going in 610
Tds going out 710
PH is fine.
That TDS number seems really high to me. In full flower I'm at 400 PPM - 80-100 PPM (Tap Water) = 300-320 PPM on my sativas. My guess is that you've got some pretty high ppm tap water. What does your water source look like; are you using tap water and just phing it?