Fuval/Aquaclear 30 Filter Media Maintenance KitFluval AquaClear 30 media maintenance kit contains a trio of the best filter media available. The kit includes: 1 x Biomax (2. 29 oz 65 g), 1 x Activated Carbon (1. 59 oz 45 g) and 1 x Foam Filter inserts. This filter media trio is ideal for aquariums up to 30 US gal (114 L). Key FeaturesBioMax Filter Insert provides an optimal environment for the colonization and growth of beneficial bacteria, which is essential for effective biological filtration