As professional ii filters are not supplied with media this is a simple and very cost effective starter pack including all the filter pads and media you need for your professional ii filterr the set containsr ehfimech x 2 litres removes all coarse and fine dirt particles from the waterr substratpro x 2 litres for quick colonisation of bacteria and faster decomposition of toxinsr coarse filter pad x 1 large pore sponge giving bio mechanical filtration and even water flow throughr fine fil