Tube Settler Media 1 CBM This tube settler media is a revolutionary type of media that ensures optimum growth at all stages of the aquarium. It removes odors such as ammonia, nitrate, and phosphate. It also filters out dirt particles, water sediments, and other contaminants.Tube settler media is a tubular filter media that can be used on deep well applications. It is an alternative to sand filters and offers a low cost, long lasting solution for water treatment.