I have seen pics of tanks, where people take clay flower type pots and break them up to make them into caves (great idea by the way) and I thought it looked very cool. So that is what I want to do to my tank, can I use the plastic version of the pot (plastic instead of clay)? Or is the plastic bad for the fish, the reason I ask my local lowes and Wal-Mart do not have any small 2.5" clay pots only in plastic. They do have the large clay pots just not the kind i need.:help: