So I posted earlier about being excited and researching for months for this day. I have a broody hen who I am letting sit and I also have an incubator for back up that I am placing a few of the eggs in along with my broody hen. Well on a side note I am scared none of the eggs will be worth it now. They were collected Monday early morning shipped Monday but are delayed somewhere on some plane/truck because of the nasty snow storms. I hope they show up tomorrow. Anyway my question... I am letting my incubator test one more time and I had a question about the water tanks. I have just a very small incubator. The water sells are a circle within a circle. So a small overall surface and a larger surface. When we are in incubation mode (days 1-18) should I just be filling the small one and then to up the humidity fill the larger surface area one and the smaller? I am getting my humidity gauge tomorrow so am unsure how just the small one being filled is working right now.