These ground fireworks are easily distinguished from aerial fireworks by their warning label, which reads “Emits showers of sparks.” A 500 gram fountain is one containing no more than 500 grams of powder, approximately 1.2 pounds of powder. These fountains are the largest consumer fireworks fountain available. They consist of multiple tubes fused together to create one masssive fountain. Fireworks fountains of this size contain many effects and almost every color imaginable.