Patent ID: 8017007

Claim:
A filtering unit for an aquarium, said filtering unit comprising: a closed casing to be immersed in aquarium liquid, inlet means for allowing inflow of said liquid, a liquid path for forcing said liquid to pass through filters, outlet means for allowing outflow of said liquid, and an electric pump assembly for forcing said liquid to circulate along said liquid path, wherein said outlet means comprise a lower outlet, an upper outlet vertically positioned above said lower outlet, and an intermediate outlet in an intermediate position with respect to said upper and lower positions, wherein said outlet means comprise a multiple outlet selector, so as to allow selection of an outlet among the lower, upper and intermediate outlets, wherein said multiple outlet selector may be positioned in: a first position, which communicates said liquid path with said lower outlet and allows liquid to exit the filtering unit through said lower outlet, a second position, which communicates said liquid path with said upper outlet, so that to allow the liquid to exit the filtering unit through said upper outlet, and a third position, which communicates said liquid path with said intermediate outlet, allowing the liquid to exit the filtering unit through said intermediate outlet.