Fluval AquaClear AC50 Aquarium Backpack Filter Maintenance Kit

Includes mechanical (bio-foam), biological (BIOMAX) and chemical (carbon) filter media. BIOMAX: promotes the growth of beneficial bacteria for effective biological filtration Carbon: improves water clarity and removes odors, discolorations and impurities. Bio-Foam: Traps particles and debris Includes: 2 x activated carbon, 1 x Bio-Foam filler and 1 x Biomax loads