yellowing a bit on newish crop need help DWC pt2

SPECS:
-800w DS at full power 32" from canopy
-Ambient temp 82 deg
-Res temp 70 deg
-Res PH 5.7-5.8 (ideal) checked every 12 hrs
-RH 56% (just did res change spilled some water, normally 60%)
-Co2 1250ppm ( increase with tank and solenoid valve)
-Nutes are Maxigrow 1 tsp ppm is 450
-Calmag was added 170ppm
-5 gal bucket
-10" netty pot
-Hydroton
-Fan
-Tap water starts at 7.3 PH and 150 ppm

3pics timeline style right is youngest​