Not sure whats going on here?

[StevOrganic]

Hey guys so I'm at about week 5-6 in veg and plant is getting bright yellow at flower sites and leaves are a little wrinkly. Also there is purple patches on alot of the fan leaves.

Growing in biobizz allmix and I have re-potted twice from 1 -> 5 -> 15l airpot and last transplant was 2 weeks ago to 15l.

 

[namvet25]

Plant looks good to me.Are you still using biotabs? and are you useing cal/mag?

 

[StevOrganic]

Plant looks good to me.Are you still using biotabs? and are you useing cal/mag?

Hey man not using the biotabs and haven't added the calmag yet will do from next feed going to flip to 12/12 in about a week or so. The yellowing and wrinkly leaves isn't so bad now think I watered before soil dried out enough stopping the roots from getting oxygen could this cause the yellowing and wrinkled leaves?