That temp range should be fine. Mine stay in 70-74, but the room has gotten colder than that on occasion.
The wood pellet bedding can usually be found at farm supply stores. Where I am I get it from Southern States but I do not believe you have that store where you are. You could go onto Tractor Supply's website and look up a location in your area.
As far as their colors. I'm just learning about mouse genetics and my most recent mouse litter was from an agouti buck to a black self (all black) doe. All the babies are agouti. Agouti is written as A/A. Black self is a/a. So unless the agouti is A/a (which would still display agouti), all the babies should be A/a (display agouti self, carry black self). If the agouti is A/a, you have a chance of getting black self babies in the litter but just like with ball pythons, each baby has a chance and its not guaranteed. Judging by how many babies you have and the fact they are all agouti, I think its safe to say he is A/A and does not carry black.
Reply With Quote