Bacto Home is a support suitable for the colonization of filtering bacteria specifically designed to have at the same time a high surface to increase the filtering capacity an optimized flow to avoid the formation of preferential paths and the blocking of the water flow and a great flexibility of use. Bacto Home is in fact suitable for creating submerged filters inside the classic external filters percolating filters or MBBR filters (Moving Bed Biofilm Reactor). The classic ceramic razor clams even those ultra porous with the passage of time see a drastic reduction of the filtering surface given by the inclusion of all the micro porosity. This leads in a short time to the decrease of the active surface to the external surface only. Bacto Home on the other hand is designed to maximize the surface on which the bacterial biofilm develops and is not modified over time. If used with a suitable pre-filter Bacto Home is maintenance-free.