I wanted to create a circulation pump out of an air pump. The propeller spins and creates a small amount of horizontal force.
Unfortunately due to limitations with air bubbles it does not spin fast enough to replace a true circulation pump. But if you need a small to moderate amount of water flow this can do the trick.
It is designed to be inserted into some spare airline holder suction cups. I got it for 2.99 at petsmart. Top fin brand.
https://www.petsmart.com/fish/filters-and-pumps/air-and-water-pumps/top-fin-aquarium-airline-holders-55053.html?fmethod=Search
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The author marked this model as their own original creation.