Conrad's Holland Lops

Setting up a regular litter box

Select a pan. Basic plastic cat litter pans work best. Stick to the medium or large unless your rabbit is very tiny. However, you can't go wrong with a larger litter box that your rabbit can grow into. A giant cat pan can be used for bonded pairs. If you have a pair of bunnies, you can also give them multiple boxes to keep them well-supplied with hay and fresh litter.
Add bedding and hay. We recommend using CareFresh (a rabbit-safe pet bedding that does not contain any pine or cedar products) and fresh hay to prepare your bunny's litter box. Spread one inch of clean CareFresh covering the bottom of the pan, then add a big handful of hay. Remember to use rabbit-safe litters in your bunny's box. Clay and clumping litter for cats can be dangerous to bunnies, as they may ingest some of their litter while eating hay. Pine, cedar, or other aromatic wood shavings may also be harmful to your rabbit's health. Sticking with a simple, paper-based, recyclable litter provides your bunny with a safe litter and is also environmentally friendly.
Keep the box fresh. Change your rabbit's box every day to ensure a clean, fresh box. This will prevent your bunny from heading to cleaner places to eliminate. If your bunny does not soil his box completely within a 24-hour period, simply add another large handful of hay the end with remaining clean hay. Never go for more than two days before giving your rabbit a fresh litter box. When the box gets dirty, dump the entire contents into your yard waste container or regular trash for disposal. If you're a gardener, your rabbit's litter box waste makes great composte! Wash the box, and if urine build-up occurs, soak it clean with plain white vinegar

Here’s a link to my preference on litter box.

Setting up a regular litter box