![Image](http://i61.tinypic.com/40z06.jpg)
Realistically, I'd like to purchase most of the materials at the dollar store except the aquarium silicone. If I go to the 'flower section' and buy gravel and stones there, is it safe to use on this project as long as I wash it well? Or do I actually have to buy the gravel/rocks from the pet store? I know the plants from the dollar store are safe, but what about other materials?