Northern Lights Auto

I notice they are growing a bit slow and also they are stretching a bit, I lowered my light to 85cm (on the day 14) using the blue light. I am using Foxfarm Ocean Forest, I didn't add extra nuts and I have been using water with a PH between 6.2 and 6.5. Not sure what is going wrong, the only thing I could think is some stress due to too much water at once (I water every 2 days), now I started using a spray bottle.