Ok for some reason this round I have been having a big problem, started from clones and everything was looking great till they got about a foot or so tall then they started looking like the pics I am posting. The have pretty much stopped growing the stock and stems turning purple even the veins in the leaves are purple. They are also droppy like there not getting enough water and leaves look really puffy not flat and this is new and old leaves. I have had my ph at 5.8 water at 68 degs.(water chiller) room temp is 80 light cycle is 18/6 using dyna grow for nutes with ro water. I have flushed and new nutes several times. I was thinking a cal/mag problem sense I wasn't using cal/mag additive with using ro water but tried adding that and it hasn't seemed to work I'm at a lose here not sure what the deal is.