For leopard geckos there is a danger of providing too much calcium so I think the meD is fine. There is a difference of opinion about leaving calcium in the enclosure. Some people are convinced that the gecko knows exactly how much calcium it needs and will supplement itself appropriately and some people are convinced that it won't. I switched to Repashy in 2009 and stopped leaving calcium in the enclosure except for new hatchlings. Things worked out well with that method.