Staring a new 40G and have a water Question??

[Jason McK]

I would like to start my new 40 with water from my 75G. I haven't got the tank so after doing a water change on my 75G I would like to keep that water. my question is. Do I need to keep the water heated and have a power Head for aeration.
I'm not sure when I'll get my 40G, hopefully in the next week or so.
I don't even know if I will use cured or uncured LR.

I planing on moving my BTA and Clowns into the 40G
Is it even necessary to keep the water from my 75G?

J