Nocturnal change value

[MitchM]

Nocturnal change value seems to not allow a change greater than -3C.
Is there any way to increase that value?
I would like to increase the change value to -7C.

[Matthias]

does your tank temperature vary that much in one day?

[MitchM]

I would like to be able to set it up that way.
In Nanwan Bay, Taiwan, natural reef temperatures fluctuate between 21C and 27C daily.