its plantation soil bricks from the pet store and i use dechlorinated water when expanding the bricks.
you got a lot of advice already, I will address this one. plantation soil is not the same, look for eco each by zoomed, plantation soil has more plant matter that you need to take out in order to minimize impaction risk, eco each is more fine fiber.
Save one animal and it doesn't change the world, but it surely changes the world for that one animal!