What should be done if aeration occurs while filling the foam tank?

When aeration occurs while filling the foam tank, stopping the pouring process until the bubbles dissolve is the appropriate action. Aeration can introduce air into the foam solution, which can negatively impact the quality and effectiveness of the foam. Continuing to pour could trap more air in the solution, leading to an unstable mixture that may not perform as intended in fire suppression scenarios.

By halting the filling process, the concentration can settle, allowing any entrained air to escape and the foam solution to return to a more uniform state. This ensures that the foam concentrate can properly mix with water, maintaining its proper function during firefighting operations. A well-mixed foam solution is crucial for effective suppression, as it maximizes coverage and reduces the risk of re-ignition.

The other options may lead to inefficient foam production and could compromise the firefighting capabilities of the apparatus during an emergency situation.