Hey mate, firstly plants are looking great.
I always tell myself this when I THINK my plants are looking terrible too..... "It's always better AND cheaper than buying it from some shady little grease bag in the dark somewhere" lol.
So think back to two days ago, you must have changed something for them to go bad. I'm not saying you did and I'm not trying to be patronising, only helpful. Just a suggestion.
If nothing at all has changed then you should have already started thinking about a feeding schedule.
I grow in soil (you're welcome to check out my diaries) and at the two week mark I am already feeding my girls. When you grow in Coco you need to feed from day 1.
DWC or RDWC isn't something I'm very knowledgeable on and maybe other gurus here can offer you better advice, but maybe think about offering a light feed and see how she goes.
Of course you can't forget the obligatory "hAvE yOu BoTHeReD tO ChEcK yOuR pH?!?!" haha.