help my granddaddy turning yellow

jay510

Active Member
this is my first grow im growing 11 grand daddy purples one of my babies died already so now its 10 im veging with 600 w hps i dont know whats going on my babys leaves is turning yellow my room stay from around 63-68 my tap water ppm is 420 w food is 800 ppm ph 5.9 and this look is day 5 could anybody help me please thanks
 

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