This very fine calcium supplement is top of the line. Utilized by zoos, professionals, and regular old hobbyists like you and I. Made from the shells of oysters, Rep Cal Ultrafine is naturally free of phosphorous, so it’s safe to offer to all of your insect or veggie eating reptile buddies. They have added vitamin D3 which aids your pet in metabolizing the calcium. This supplement is especially popular with bearded dragon and chameleon owners.