HOB filter (Hang-On-Back filter)

A Hang-On-Back (HOB) filter is a common aquarium filtration device that hangs on the edge of the tank. It works by drawing water up through an intake tube, passing it through filter media to remove debris, waste, and toxins, and then returning the cleaned water back into the tank. This process helps maintain water clarity, health, and stability, making it easier to keep a clean and balanced aquatic environment. HOB filters are popular because they are efficient, easy to install and maintain, and suitable for various tank sizes.