Grand Effects WBCORCON30SSG 30" Stone Gray Corinthian Concrete Water Bowl. Fire Bowls with Automation Made Easy. Our Grand Effects’ System works with any home system or pool controller, such as our Jandy-Aqualink. Our technology is reliable and proven. Our technology is a CSA certified packaged unit, factory tested and easy to install. Grand Effects Fire Bowls are available with manual or automated operation.