the odor—not putting foil in the tank.
Could Aluminum Foil Damage Your Toilet? It depends on where the foil ends up and how the toilet is designed.
A small piece of foil sitting harmlessly at the bottom of a tank may not cause an immediate problem. However, leaving foreign objects inside a mechanism that relies on moving parts and reliable seals is unnecessary.
Potential concerns include:
Interference with the movement of the float or fill mechanism
Obstruction around a valve or other component
Complications during maintenance or repairs
Misleading confidence
