1.This Aquarium Fake Grass will help bring a lifelike, natural feeling to your fish tank landscape. This is a practical decorative accessory and an excellent gift for fish farmers. It adds a beautiful scenery to your aquarium, so that the fish have a more comfortable living environment. 2.The Aquarium Fake Grass are made of plastic. They do not affect water and related aquarium conditions. 3.Because it's a brand new product that uses pigment coloring and is shipped sealed in small boxes. So there will be a slight smell. Thanks for your understanding. After washing and ventilating with warm water, the smell will disappear in a short time.