Blue Dream matic auto's in coco 1st grow

So week 2 started them on nutrients now they are looking better every day sorry for the lack of pictures my phone's camera sucks so I tend to shy away from using it I am borrowing a friends camera soon so I will try and get as many pictures as I can while I have it. I noticed a slight magnesium deficiency in the plants and decided to lower the waters ph to 6.2 as 6.7 was too high and I think it was locking the roots so I flushed with freshly made water and they seemed to bounce back fairly quickly. ****Mid Week Update**** So they are starting to fill out more. im wondering what you guys think should I switch them into larger pots now or wait a few days and I'm thinking about moving them from the 45w LED to the 600w HID tomorrow or do you guys think it will be too strong for them at this stage. So since I started them on veg nutrients I actually started them the day before I updated the post but couldnt update due to time constraints and one of the plants that was slightly lighter in color has now made a recovery after about 2-3 days and although the lower leaf tips have deteriorated they seem to be almost back to there correct color entirely new pics added too and commented on the sickly plant. poor girl she just needed her nutes.