Ok so I work at an outdoor pool with the city and there's a couple other pools around too. Each pool likes to prank eachother. We were the first victims of the summer where a week ago I came to work finding a toilet in the deepend and a note saying how we got owned. So someone had said he remembers some powder that when you put it in water it turns to jello or something. I want to know what this powder is because we want to turn the other pool's wading pool to jello in retaliation. Any help would be great!