I suggest perilite, much cleaner and I have heard too many bad things about vermiculite.
I use egg crate under my eggs and wouldn't do it any other way.
I just add perilite and the egg crate and fill with bottled water until the water almost touches the egg crate.
I use locking lid tubs that have 4 tiny holes for ventilation, I do not use pop top $1 tubs since they leak like a sieve.
The fans in our big incubators are bathroom ceiling fans that run at 110 cfm until we turn them down with the rheostat.