Hello- I was trying to get a small fan to add to my incubator for air circulation since right now it’s still air a still are homemade one. Can I use this very small 5 inch portable fan somehow? Or do I need to use a specific type of fan for the air flow? Please see the photo. I have 2 duck eggs on day 12 and I’m trying to regulate the temp and humidity especially for lock down so I am trying to see if adding a fan would help. Thanks!!!