playsand itself is fine, i can give you several reasons to use it over any pet store sand. principally, it doesn't clump as much as calcium or vita-sand, the clumping ability of the reptile sands the main reason for their danger of impaction. second, price. to fill a 75 gallon tank (my mind the min. for a large adult dragon) with calci sand would cost something like 30-40 dollars at 10 dollars per 10 lbs. (what my pet store charges) vs 2.99 per 25lb bag of playsand at the hardware store. cheaper, safer, not lining the pockets of massive corporations which 90% of their products look like props from bad smurf episodes (honestly, who else is tired of the mushroom covered resin half-log things?) , and most importantly, not sold in *****ic colors. yes, we all know the outback glows in the dark, the Sahara is purple, and neon green the dunes of Mediterranean beaches-can you feel the sarcasm?
bottom line, for particulates the most common product is playsand. as for solids, i vouch for ceramic tile over slate because of its durability, and not in need of sealing. this is what i currently use, for ease of cleanup. its a matter of preference.
good luck with your choice :mrgreen: