This item is a JAD aquarium filter felt or pad used for mechanical and biological filtration to keep water clean.
Purpose: Designed to retain coarse dirt particles in both fresh and marine water tanks.
Functionality: Provides both biological and mechanical filtration, ensuring a clean and healthy environment for fish.
Features: Made from a dense felt material that effectively traps debris while allowing water to flow through.
Usage: Ideal for customized filter setups, as the felt can typically be cut to size to fit various filter types.