Fluval U4 Media Value PackSpecifically designed for use with the U Series internal filters, featuring all the quality, effectiveness and convenience you've come to expect from the leader in aquatic filtration. These value packs deliver all the necessary media required to keep your filter operating at peak performance for up to 6 months.Biomax Complex pore system maximises water contact time and surface area to support and promote beneficial bacteria growth. Maintains nitrogen cycle to reduce and control toxic ammonia and nitrite. Bio-Foam Effectively traps majority of waste and debris. Complex foam structure maintains consistent water flow and naturally promotes beneficial bacteria growth. Poly-Carb Dual action cartridge features separate polyester and carbon layers. Polyester layer traps fine debris and contaminants. Carbon layer filters out harmful toxins, discolourations and odours.
