Its hard to tell anything in the purple light, the only thing i can see is burnt tips from to much nitrogen..... well and if the colourleave is drkgreen too. Then go on with only water. Automatics are sometims picky. Some strains need as well as no nutrients. So keep it like now only water and maybe some beneficalstuff like molasses ans silica. Give her only one time in th eweek a feeding with less than half amount , than recommended. Then look how they respond. They are sitting in big pots and looks like they have enough nutrition for now.