float, a flush valve, a seal or flapper in many traditional designs, and other components that work together to refill and flush the toilet.
A ball of aluminum foil doesn’t perform any of those functions.
It doesn’t adjust the water level, improve the seal, clean the bowl, or repair a faulty mechanism. Depending on where it sits, it may simply float around or rest against a component.
The more important question isn’t what the foil might do in theory, but whether it has a proven benefit in a working toilet.
