I bought some new terra-cotta pots yesterday and they have a small hole at the bottom that I'd like to fill in.
The reason for this is because I had a nice pot with a hole in it and one of my fish managed to get stuck in there.. I broke the pot to try and save the fish but she was too weak by the end of it so I had to kill her
Just anything that I can shove in the hole that won't effect my fish
Also not too large because it will be used for breeding