A very cost effective starter pack including all the filter pads and media you need for your Professionel 3 filterThe set contains:Ehfimech x 4 litres. Removes all coarse and fine dirt particles from the waterSubstratpro x 8 litres. For quick colonisation of bacteria and faster decomposition of toxins.Coarse filter pad x 1. Large pore sponge giving bio-mechanical filtration and even water flow-through.Fine filtration x 1. Before the water re-enters your aquarium fine dirt particles are trapped in the fine filter padSuitable for Professionel 3 2080/2180 filter