So, I have began working with clay along with my grandmother. I want to build something for my guppies. I was thinking something that they can go in and out of, like a little fish house or a decoration with tunnels. Something along that line. I have looked it up, the glaze my grandmother uses is fish safe so it should be all right for my fish. It can't be too big because of the size of the kelm and the size of there tank. Any suggestions or designs on what to make?