Quote Originally Posted by mxrider42
How much hatchrite should I use?
Fill your egg box halfway with hatchrite.

Quote Originally Posted by mxrider42
Where should my probe for the ranco and thermometer go?
Inside the egg box with the eggs. Like this:


Quote Originally Posted by mxrider42
Should I just put the thermometer in the tub with the eggs?
You can, just to check the temperature against the ranco, but, I would trust the Ranco's thermometer above an acu-rite or similar.

Quote Originally Posted by mxrider42
The hovabator has the wafer thermostat (correct?), what should I set it on?
The wafer is basically going to be inactive if you have a Ranco controlling the temps. You'll want to turn the hovabator at least 3/4 of the way to max, plug the hovabator into the ranco, and then the ranco will control the heat source, hopefully keeping your box at 88-89 degrees.

Hope that helps.