After the short time I've been using this tiny box, and thinking a bit, coco may not be best, since the LEDs supposedly require less water, but I like it so much in it's simplicity and ability to go unkept for 3-5 days at times. So I'm not positive on coco as a medium. It's kinda up to the clones to really see what the LEDs can do. I can get pics on here when my clones are in, it's kinda shit looking right now too, the plants I want to bud are in intensive care. One was used for clones and it a stick and the other looks like it just needs love and care but may be good in a week or so. Seedings at 3 weeks look pretty sorry. LEDs and pests= sad sprouts. (I think both contributed, each it's own set of problems) pretty much any plant put under LEDs early <2 weeks grew poorly.