What protocol should be followed if Nitrox is suspected to be contaminated?

If Nitrox is suspected to be contaminated, the best protocol to follow is to not use the tank and report the issue. Contamination can significantly compromise the safety of the gas, potentially leading to serious health risks such as oxygen toxicity or other gas-related problems during a dive. Contaminants can vary, including improper mixing ratios or the presence of unwanted gases like carbon dioxide or other substances that can affect the gas's safety.

Choosing to not use the tank eliminates any risk associated with diving on potentially dangerous gas. Reporting the contamination is vital for ensuring that safety protocols are followed and that the tank can be properly assessed, evaluated, and cleaned if necessary. This approach helps maintain overall safety standards and ensures that other divers are informed about potential hazards, promoting a culture of safety in the diving community.

In contrast, using the tank at a limited depth, labeling it and continuing to use it, or attempting to mix it with another gas could all lead to unsafe diving conditions and should be avoided.