You will need to buy about 50 pounds of chicken scratch. You can get this at any feed store and it costs around $20 for the 50 pounds. You also need baking soda and you can use cedar shavings but these are optional. The shavings are for scent so you don’t actually have to have them.
You just need to pour enough chicken scratch into your litter box to cover about 2 inches. Next, cover the chicken scratch with about ¼ cup of baking soda and if you have chosen to use cedar shavings, crumble just a couple of handfuls on top and mix the ingredients together.
This is scoopable litter so you can use your scoop to clean it out every day and keep it fresh. Just replace as you normally would.