【Package List】You will receive 24 aquarium media bags including 2 different colors, namely white and black 【High Quality】Made from high-quality polyester, these aquarium filter bags withstand long-term use in both freshwater and saltwater environments 【Practical Zipper Design】Each aquarium media bag is equipped with a zipper on the top for easy opening and closing. This design ensures that the filter media is always wrapped inside, avoiding leakage problems 【Versatile for All Filter Media Types】This aquarium media bags perfect for organizing bio balls, crushed coral, volcanic rock, and other aquarium filter media 【Improved Water Environment】Simply place the media bags for aquarium filled with the media of your choice into flowing water to help create a quality living environment for your fish pets