I do things a little different when plants are small especially in a bigger pot. I only water a small amount about 2 inch's out from the stalk around in a circle. Regardless of what you have read it is possible to overwater in coco. Don't over feed cause you won't achieve run off for atleast a week maybe two. Once the plant is more established and has more roots you can start watering to run off, but will prob need to skip a day or two in between waterings at first. I don't let my pots get super dry, but I do let them dry out a good bit before watering with small plants.
If you keep a seedling in really wet medium the stem will rot.