I had the light a little close and it was causing the leaf edges to curl up slightly. I realised the water temp in the last week was too hot I hope it didn't damage the roots. The one plant is still drooping despite letting the soil dry. I just don't have luck with Coco Coir.
@Lacrima, thanks a lot to. We always think weed should be this dark green but they have personalities of their own, the two same strains under the same conditions, but they grew different. The big one has numerous color changes, and the bushy one dark green and dense.