I'm working on my DIY incubator that should hold 5-6 egg tubs (which is more than I need but at least it'll last a few years). My vessel is this: http://www.walmart.com/ip/Coleman-Xt...ooler/14574678 and I'm basing it roughly off this model: http://www.reptileradio.net/reptiler...or-in-pictures

I was talking to the guy at radio shack and the only fans he had in stock were these: http://www.radioshack.com/product/in...ductId=2102823 He said that I would need two fans for the size of my incubator. But the fans look pretty big. I was going to put each about 1/4 way from the edge of the vessel and embed it in the egg crate (like in the model).

My question is is this: Is two fans enough? Or is it overkill? I just want to make sure my temps are fairly stable and it won't dry out my eggs (I don't think this is a problem because I'll be using shoebox tubs with press-n-seal with no vent holes - I'll just open the tubs one a week for fresh air).

This is my first incubator build for my first clutch...so I want to make sure I do my eggs justice. So please, any constructive criticism is welcome all other snide remarks are not.