I've been learning more about corns also. Like, this website says hot spot of 88-92, but then some people said that will cook them.

If I'm correct, ambient can be 78-80 with a hot spot of 80-84.

You could direct a small fan at them if you think there tubs are getting too hot.

I'm not sure if Corns need a hot spot, or if they can just do good with a single ambient temp of 80-82.

I'm sure someone will chime in.