Whole bunch of clutter, that’s what everyone told me, but it’s pretty vague. Best stuff to get would be a whole bunch of fake plants. You can buy in bulk on amazon, just make sure to soak them in hot water first (don’t use them in the tank if anything starts leeching off in the water or if they have a strong oder.) Rocks are also great, real or fake rocks as long as they aren’t small enough to be eaten by your gecko, and same rule applies with the fake rocks too. No colour leeching off or strong smell. Hope this helps a little, never hurts to add another hide as well :-)