Hello, I just took the time to read this thread, and the deleted posts from this thread (I can see what has been deleted). I have to say, I am less than impressed by how some of you have handled yourselves. Substrate debates do not make one person "right" or "wrong". It's all about experience, research, and the route that each keeper decides to take. Particulate substrates come with risk. Everyone that keeps reptiles and has read about them online is aware of this. Certain species are more supseptible to impaction and complications when kept on certain substrates. While there may be risk with all substrates, it is the keepers decision whether they choose to use them or not. All anyone else can do is try to share what they have learned. The title of this thread is "Calci-sand?". Calci-sand, in my opinion, is one of the absolute worst substrates on the market. Anyone who wishes to use sand in their enclosures should avoid calci-sand and stick with normal, small grained, washed playsand. Calci-sand is vastly composed of calcium carbonate. Calcium carbonate is the active ingredient in many antacids. When consumed, it can and will neutralize the acid content in the stomach. With reptiles, this is dangerous. Seeing as accidental consumption is likely, they could easily consume enough of this substrate to make their stomach acids ineffective at digesting even additional calci-sand. The problem though is that it can impair the ability to digest food adequately. It is also worthy of noting that calci-sand includes a "dust". This dust can cause eye irritation. The dyes used to color the sand is also noted as staining the skin.