2lb Fastbuds Autoflower challenge

start of week 7 Things are going well and seeing a lot of growth in the budsites and the smell is getting stronger everyday lumatek zeus pro 600w is at a hanging Hight of 48 inches running 100% power, A little experiment i have removed the two 100w bars on the centre of the led and placed a 600w hps in the centre to replace the 2 bars i have also added co2 into the grow tent ac infinity has been keeping humidity between 50-56% and the temperature has been between 26-28 degrees Celsius Day 42 the plants were watered following my feeding schedule Day 44 watered with plain water and great white Day 46 the plants were watered following my feeding schedule Day 46 more LST has been done for the last time and some defoliation to allow light and air flow to all the bud site PROBLEMS the plants in the coco mix are responding to the flush and feeding with advanced nutrients sensi coco the yellowing colouring is now turning green again but i can see this has effected the growth compared with other plants in the tent.