To reply to your comments about me being a "nervous nellie" If you read up I did not begin this post with any notion of impaction. My reply regarding that was just that, a reply to someone else who mentioned that he thought the gutload could impact my gecko. So.. yea, read up a little and you'll see that I am not "dying of worry" and what not, just wanted an answer to a simple question about calcium powder. =)
Now, about the space question, I listed all the stuff i have in my tank in my first post as well. His hot hide is a heat cavern that I bought many many years ago. Upon getting this leo I altered it a bit by removing all electrical wiring, and sanitizing it thoroughly. The cavern is just that, so its pretty big. Next to that is his humid hide, which is one of those little coconut shells you see often in the pet stores filled with some damp moss. In the opposite corner from the hot hide is an exoterra hide cave, the small version. In front of that is a corner water dish, and next to that water dish is a worm dish. Seeing as I've tried to provide paths for him to walk through to access all of his hides, me putting one more dish will block walk space a lot. All in all, I originally wanted a 20 gallon long tank.. but me and my fiance got into a scuffle about the prices so I settled on the 10 gallon. The scuffle was basically.. 40 bucks total for the 20 gallon, 8 bucks for the 10 gallon (seeing as I already had a 10 gallon screen cover). But, yea.. I eventually plan to upsize the tank as the gecko grows.