Do not use eco-earth or any loose substrate as geckos will eat it and get impacted - they like to lip at loose/powdering stuff, which is why you can put out a bottle cap full of calcium powder and they eat it. Paper for substrate is ideal for them, though some people use tile.

Mine have three hides, a warm hide, cool hide, and humid hide, as well as lots of fake low ground cover-type plants to hide in.

I feed dubia roaches, much better than crickets as they have a lot more protein and less chitin. I feed every other day and dust the feeders with a mix of calcium w/ D3 powder and a commercial powdered vitamin mix. Dubias can't climb a smooth surface and they can't jump, so I put them in a smooth-sided shallow container so they can't run off and hide.