DESCRIZIONE
A filtering unit (1) for an aquarium is described, said filtering unit (1) comprising a closed casing (2), which is to be immersed in a liquid, inlet means (3), a liquid path (4) passing through filters (8), outlet means (5, 15-18), an electric pump assembly (6) for forcing liquid to circulate along said liquid path (4). The outlet means (5, 15-18) comprise a multiple outlet selector (18) which may allow selection of outlets (15-17), in particular in a vertical direction.