ok, let me just start by saying that I did not put creatine in my tarantulas water.... my ignorant roommate used one of my water bottles for his stupid creatine mix and didnt tell me until later and i couldn't figure out which bottle he used and wanted to be sure that if I had used it, would it be harmful. I've already changed out my water bottles for new ones, and ripped my roommate a new a&&hole... Thank you guys for your prompt answers and advice. :)