Abstract: The fish tank cleaning system of this invention comprises a water pump using power of water flowing at a sink to pull by venturi principle water through a hose from an aquarium to empty the aquarium or to cooperate with tools used at the aquarium for cleaning the stones on the bottom thereof and for cleaning the walls thereof, the stone-cleaning tool comprising a housing from which water is pulled, the lower end of the housing being adapted to engage rocks on the aquarium bottom, the housing having rock-stirring means mounted thereon, the wall-cleaning being done with a squeegee having a special water and debris suction opening for delivering water to a hose.

Abstract: A fish tank cleaning system comprising a water pump, a hose connected to the water pump, a stone cleaning tool comprising a housing, the lower end of the housing being open to engage rocks on the bottom of an aquarium, a stirring rod moveably extending through the housing for stirring the rocks, the other end of the hose being connected to an outlet of said housing disposed above the bottom of the housing.