Oh man.. A fishkeeper's nightmare. I've many times explained the challenges in properly keeping comets or fancys to the family, yet my 8,10 and 12yr/old children come home from their school carnival with two comets today. Ugh.. My in-laws have a pond, but my wife and children won't hear of it. I again expressed my concerns. All no-go. Meanwhile they're in a ~0.5g spherical vase. Wonderful.