Originally Posted by wystearya
Be careful with shells. They can leach minerals into the water.
Also, some rocks/stones are safe and some are not. I've been too afraid to use any because I have no idea what is and is not safe. :/
Yeah..I researched this once and it ended up being so complex I decided to just scrap the idea of trying to find my own rocks ;)
With the terracotta pots, you can make some neat decorations by making holes in them, breaking them apart, and using silicone to glue them together. I've also seen the pvc structures- kinda neat. You can even silicone silk plants to them as well.