PROBLEM TO BE SOLVED: To provide a tool for cleaning the inside of an aquarium, which enables the grip of a suction pipe and flow control to be performed with one hand.SOLUTION: A tool 1 for cleaning the inside of an aquarium includes: a suction pipe 10 that is gripped on the side of a base end in a lengthwise direction and the tip side of which is inserted into the aquarium； a drain pipe hose 54； a pump 50 that sucks up water in the aquarium into the suction pipe 10 to send out the water to the drain pipe hose 54； and a flow control tool 40 that is provided in a gripping position of the suction pipe 10 to control a flow rate of the water sucked up into the suction pipe 10.SELECTED DRAWING: Figure 2
