Any substrate that can hold moisture, like reptile prime and reptibark are good. Even newspaper or paper towels work for quarantine. NOT aspen. It molds when wet.

A tub with a hot side (heating pad about 90° with a hide over it, and an identical hide on the cool side of the tub). Ambient temps all around at 78-80 degrees. Humidity at 50-60%, higher when shedding. You can tell because their eyes go blue.
I would suggest a larger water dish. Pythons will occasionally climb in them, especially if humidity is too low for shedding. If the tubs are too open, add more hides and things to clutter it up. Hides should be snug on the snake, with only one opening so they feel secure. They should be identical so they do not choose safety over thermoregulation.

There is a really good feeding chart on here that tells sizes and frequency of feeding. I would check that out.

Also, in case I missed it above....
House the snakes separately. Pythons are solitary. They only go together when breeding and are then separated again. And honestly, I hope you dont try to breed them for a long time so that you can learn all you can about them to be successful in any breeding ventures.

Good luck with your new snakes.

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