my first grow

AH day 52. look amazing and growing rapidly. respond very well to the LST. small nuggets are showing. I have set up the RO water filter, and are producing 0.0EC water now. I need to contact bigplantscience tomorrow and hear about nutrient mix for this kind of water. Day 55(and 43 for the FB and SK) I am convinced that my grow light is not efficient, and this is why the flowers have not developed more that they have. I have ordered two Mars Hydro TS 3000W, so lets hope it is not too late. I have notes a few leaves with the crow on the tips, I don't think it's alarming as it is only a few. I have made a video of the setup Day 59 FB- omg it has growed so much. the 20L pot has the root going out of the fabric. I cannot LST it anymore, so I will let it grow. Day 59 SK it is in 2nd place but supposedly is will have more weeks in flower that the FB. The past week I have adjusted the RO to contain 1.0 EC for the FB and SK and the runoff is actually lower. Don't know if this is a good thing or not. I have also increased the fertigation to 1,5 L twice a day.