You want to start your seed in a smaller container first. Ideally you want to water the whole container until completely damp, and then wait for it to dry all the way out so it's light and airy, and then water until completely damp, then dry... Don't try to water on a schedule, it will lead to overwatering. Seedlings in big pots are hard to water because they can't take up all the water in a completely damp large pot, and of you don't water the whole pot, the roots won't venture into whole pot. I would scoop those seedlings out and put them in well draining cups, let them dry out and read up on watering practices.