We keep our Leopard Geckos on bark cips (not pine) with a small are of calci-sand. They use this are for defecating. We keep some calcium powder in a small dish in the enclosure which they seem to use. Have had great success with this with good health and good breeding (100% hatch rates). We also dust the crickets. To stimualte drinking beahviour we spray in addition to having the water dish. When we spray they come out of the hides and start licking the rocks. Also drips splashing in the water dish attract them. We spray like this once or twice a week and this seems to do the trick with keeping them hydrated.

Bad and more bad. The bark chips if eaten will cause an impaction, and the same with the calci sand. These little guys in nature are found on hard ground or rocks, not bark or sand.

Tile or paper towels work best as substrate.

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My name is Liz
Do what's best for the animal, not what's best for you.