Hey guys and girls, I need some help. I have built an incubator and an egg turner and I have a thermometer in there that is measuring very accurately. But I don't have enough money, or the time, to go buy a hydrometer. Is this a problem? I'm going to hatch duck eggs, so I know that the humidity has to be slightly higher than with chicken eggs. But do you think if I measure the weight of the eggs and keep track of the air cells, that'll be fine? Has anyone ever done this before?