I've always been told (and read) that calcisand is the worst thing you can use as a substrate because it can impact animals? They lick it, and think its ok and then it solidifies in their stomach, worse than regular sand because it compounds or something. And they can't pass it, and they get calcium overdose if they eat too much. This was all stuff I found when researching for my leopard geckos. I don't know how it applies to beardies though. Is this true?