Tetrafauna ReptoCal Calcium Powder Reptile Supplement
I do recommend this product for dusting your crickets and mealworms - if you can handle the smell! Once I finished feeding my crested geckos my dad came in the room and asked what's burning. Seriously! The smell of this is a very very strong smell of smoke or something similar, and it can be hard to get past that. But if you can't handle the smell try getting the repticalcium from zoo med ( has i instead of o ). Which has absolutely no smell.