Backflow incense burner tropical fish dive deep into relaxation with our tropical fish backflow incense burner. this unique piece showcases intricate details of tropical fish. the playful and enchanting design brings an underwater world to life, making it a delightful addition to any space seeking a touch of aquatic serenity. once you have lit your incense cone, it will begin to smoke, the incense is heavier than air and it will fall dramatically in swirls and twists, through the hole and down over the item, to pool at the bottom. it is incredible to watch and very relaxing. please note: in order to create the smoke cascade effect you will need to use backflow incense cones.