Clawing And Buds Arent Maturing

<div style="margin:0px 0px 0px 200px;background-color:rgb(250,250,250);"><div style="margin:0px;font-family:Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif;color:rgb(51,51,51);"><div style="margin:0px 300px 0px 0px;"><div style="margin:0px;">Hey there,

Got some severe clawing on some of my plants I hope someone could help me with. I'm 4 weeks into flower with Jack the Ripper, Afgan Haze 33, White Russian.

My setup is

8 bucket DIY Under current.
1000 watt hps on a light mover
1400ppm Canna Nute A and B / CalMag/ Water Shield/ Protekt/ 
PH 6.1, room temp 75 F, water temp 73 F 

Thanks for checking it out


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Thanks. I adjusted the PH. I was also told that It could be N toxicity so I flushed and lowered that as well.