I keep two gravity waters for chicks. Plain water in one and nutri drench in the other for the first week, then plain water in both, changed daily. I use blocks to raise them up and out of the bedding. I always have two, so if something happens to one, there is a back up.
During the winter in the coop, I use a three gallon heated waterer, changed daily. In the summer, I have several scattered one gallon gravity waterers in the pasture, cleaned and filled as needed. If its really cold in the winter, I will give them nutri drench once a week.