Absolutely not, calci-sand is very dangerous to use even for reptiles who would live on sand. The fact that its made of calcium makes it dangerous. Its sharp grains, andit doesnt digest fully leaving it jagged edged allowing it to mush and lock together with other grains, slowely building a mass in the animal. Just about every case of impaction I've heard about was due to calci-sand. Corns get their calcium from the bones of the rodents they eat, they do not eat their substrate in order to pick up nurtiants as lizards do. Loose sand can get under scales, stuck on tongues, in nostrils, mouths, eyes, vents; it is not what they are un naturally and it serves no benefit to them.