Adapter for bathtub spout?

[RightTurnClyde]

I just moved into a new apartment and the water pressure is pretty low everywhere except the bathtub spout. When I hook my water changer to the kitchen sink, it's not even strong enough to activate the venturi action.

Does anyone know of an adapter that will some how fit over the bathtub spout so I can use that instead? Maybe something made of strong, stretchy rubber? Or is that a bad idea?

 

[Fresh2o]

This has come up in the past and I believe that you are spot on with a flexible adapter (from a hardware store). But I'd wait for others to confirm this.