I'm not an expert but have used 3 different incubators so IMO, start with one trough full.okay! I'll be checking the temp to, comparing what the display says abd what my extra thermometer says. I just want to see which trough i need to get the right humidity. as well as making sure my incubator is in a good place
@mstricer I'm a first time hatcher!
Also keep in mind, surface area makes humidity, not volume. And ambient humidity makes a difference too. Just food for thought as you go through this.